I think I'm just about done playtesting until the next version comes out.
Reentering the royal house in Icycull and then leaving by the front door will, like Jigglers, leave the screen-dimming overlay active. The same goes for exiting from the sewers into the Forest Cave, though leaving the cave itself fixes it, so there's no major issue.
Completing the quests "Solve the Issue!" (at least by feeding Hannah to Eira) and "The Wife's Stew!" (though I had to cheat to get the recipe, so take that as you will) leaves them in the Available quest log.
The game becomes extremely laggy in Largo's Lab for some reason. Also, the papers on his desk can be walked over, just like the Icycull Chief's. And who's the giant blob on the bed you can't interact with?
Entering Eira's cave, even after recruiting her, always plays the lines "There's a sound coming from the crack... Maybe there's something back there... Let's go explore."
Many enemies outside of Liamargia and the woods don't intercept the player, and have to be manually interacted with to start combat.
If you've expanded the lab, after completing Delayed Shipments, when you bring one of the brothers to your lab to upgrade the machines, the game incorrectly uses the original lab layout instead of the expanded lab. Leaving and reentering the lab restores it to the proper layout.
Having multiple Capture Nets in your inventory, as a result of the Jello Plains tutorial bug, allows you to keep using your Capture Net after it has dropped to negative durability. The game says that it breaks every time you use it, but it's never removed.
Certain enemies, like Bandits and Thieves, increase Lucia's corruption if she eats them after combat. However, allowing a party member to eat them instead leaves Lucia's corruption as is, despite her deciding their fate. I could see arguments either way.
When Zora and Zola are speaking with the Slime Queen, the queen uses her slim portrait despite having been fattened.
Is the hidden bunker mentioned in the forest implemented yet? I notice that there's no quest associated with that dialogue yet, so I wouldn't be surprised if it's still in development.
Feeding the Blue Slime at larger sizes renders the text "f[1,0]Hey! Are you hungry by any chance?"
Praying to the Goddess can reduce your corruption to negative levels, which seems like it might not be intended to do.
It's never made especially clear exactly what Virus Effect does as it advances.
The way using food items works, you can select two different targets for its Fullness and non-Fullness effects. If you select a Whole Roast Pig, use it on Lucia, but then answer "Give the Whole Roast Pig to whom?" with Isabelle, Lucia will receive the healing, but Isabelle will receive the fullness.
The wounded Mezeti gate guard should probably be removed after dealing with Eve and Mallory.
Siding with Mallory against Eve, and then letting the two work out their differences themselves, causes the player to be frozen in place permanently when they attempt to enter the Inn.
Finally, Eve and Mallory leave non-interactible sprites behind them in a number of places, screencapped below.
1: Believe Eve, before leaving the field. Can be walked through.
2: Believe Eve, leave and return to the field. Cannot be walked through.
3: Believe Mallory, eat both Eve and Mallory at the Inn. Cannot be walked through.