Not exactly a bug, but for the trial, one of the options for what killed Lord Aldric is "poison administered by another method." I would say that he was definitely poisoned by the needle rather than the tea, but if you select that option instead of the one about the wound, the game counts the answer as wrong. I would either get rid of this option altogether or make it so that it can be used as a correct answer if you know about the weapon. 

This is not a bug, more of a...realism thing? Representation quibble, I guess? It's specifically about Dowager Countess Yvette and her wheelchair use.

She's in a manual chair (I mean, I assume), but we never really see any mentions of her having a nurse or an attendant (isle native or otherwise) to help push her -  she can navigate on her own to a certain extent, but she's an elderly woman with limited reserves of energy and she also has to, presumably, navigate stairs as well as less forgiving surfaces like the fields outside the castle. They don't need a sprite or anything, but a mention of some kind of support worker character accompanying Yvette would probably be appreciated by a lot of players.

Might be a bug, I’m not sure?

If you get the jiyel/arland war ending and have not romanced zarad, then avalie's ending says her engagment to zarad fell through, but zarad's ending still says they got married.

In week 1, I used my open time slot to practice with Ana for +5 self defense, then the next scene was Jarrod's date. At the end when he talks about finding a bride i said "let me know if you find her" and then it re-played the bit about practicing with Ana and I got another +5 self defense before it moved on to the next morning.

In one playthrough I was close enough with Lisle that he told me his secret. During the negotiations in week 7 I was given the option of revelaing that secret or not.

in another playthrough Lisle didn't tell me himself, but I found out anyway through exploring the castle. In this playthrough the option to reveal the information never came. The whole thing wa just never mentioned again. Seems odd since a player who found out by sneaking seems more likely to want to reveal it than someone who's friends with Lisle.

edit: okay,  after looking at the game script most of the stuff below can be disregarded. The game doesn't intend to set the time slots to 21. Instead, it's a repeated error in the script, where it tries to set variable to 0 and then increase, but it instead issues instructions

$ timeu == 0

which is a comparison, not assignment, and does nothing to the value of the variable. These pairs

    $ timeu == 0
    $ timeu += 14

should be replaced with a simple

$ timeu = 14

instead.

Not sure if this is error or oversight, but in Week 4 there's a distinct difference between what the game tells the player and how it plays out in terms of mechanics.

At the start of the week you're told that with Matchmaker business out of the way and with everyone spooked by murder and not doing any social stuff, you'll have much more time at your hands than before.  And the "Time" panel which in previous three weeks starts at 14 (2 activities per day) is set to 21, which implies you should be able to pick 3 activities per day.

Except... nothing actually changes compared to previous weeks -- you still only get the same 2 slots per day. Add to this that couple of slots are typically blocked by social visits (one from potential partner, and one on Friday with murder clues) So you're effectively left with 10 slots before the trial, and out of these 7 are needed for full investigation, and 1 for personal plot. Leaving you with mere two slots to do anything else. Which is hardly much more free time you're supposed to have. And incidentally means if you haven't had the skill levels needed to perform investigations at the start of the week, there's practically zero chance to address this matter.

If this sort of crunch was intentional, then the Time variable on the Info panel should be perhaps adjusted so it doesn't mislead the player that they have more time than they actually have. Though it'd be probably far more considerate to instead do what the game claims and allow an extra activity per day, for more leeway.

(on a side note, it's also a bit frustrating that when you choose to explore the staff quarters MC suddenly turns braindead and even if they know about certain "Lee" who died and whose identity is pretty much known at this point is likely connected to this murder, they are only capable of searching through his room if Kade deigns to tell them so. But that's technically not a bug so, ehh ._.)

On a different note. When trying to arrange political marriage with Jarrod,  the condition seems to be reversed here:

            if jar_rival <= 15:

He'll reject the proposal at low rivalry, but given that he talks how the reason is because he hates the MC, this likely was supposed to be jar_rival >= 15

edit: another potential small error:

            if i2 >= 190:
                play sound "music/yay.wav"
                $ well_approve += 10
                "Thankfully you are extremely talented in reading people just right. So your ability to flatter is really quite masterful."
                "And you can tell that your words hit as member of the delegation after member light up, clearly thinking better of you for your words."
            elif i2 >= 170:
                play sound "music/yay.wav"
                $ well_approve += 10
                "But as it happens, you are rather good at both reading people and as a consequence flattering them."
                "You can tell that your words hit home and you have made some inroads in gaining the approval of the delegation."

pretty sure the first gain here should be +15, given that a) this is the highest gain in the "best" option for other delegations, and b) passing the second tier check elif i2 >= 170: also gains 10 points (which does match the other delegations)

Minor bug, not sure if it has already been flagged, but I got contradictory Avalie epilogues on a recent play through. I had become her friend (not ally) but then blackmailed her and was told both that she was a rival for life ruining my life behind the scenes and that we were good friends exchanging letters. Also I'm not sure if this is the intended result, but I had successfully set up the Jarrod/Gisette throuple ending, then resolved Revaire by convincing both Gisette and Jarrod to step down. Even though I had reformed Jarrod and convinced him to step down I was told in the epilogue that he was furious for my part in his loss of power and broke our engagement, and so just got the Gisette ending. My guess is that politically marrying Jarrod might not work if he's not the crown prince anymore, but I found the text pretty confusing in the circumstances, since he shouldn't really have been surprised and angry.