Back again with few more bug reports.
-An sound load error after first private meeting with Mermaidon. The bug appears frequently every few seconds until the game is closed and reopened. Can currently be solved by players doing a save after the scene is over, close and reopen the game, then load the after scene save.
-Vanishing Ryudamon character model in 2 spots after meddling with Leomons Memories in a harder way and changing few fates. Bancho Valley entrance & Town Shop area.
-Another odd issue when using a save from the older demo version. After beginning adjustments the cast had already gained so much experience they instantly level up from lvl 20 to 28 after any exp gain. Issue is that they skip the level gains and skills of 21-27 lvls. And there are some Powerful skills there to be missed... The old versions gear and items may be a nice collection and boost, but currently its more beneficial to level up directly from the current version for a stronger endgame.
[Correction] I was just being dummy compering boosted character stats (permanent upgrade items and one event) on differently routed saves, stat gains works as intended. But i did notice few skills missing, mostly its the combo moves. Both Lunamons are fully unequipped on gear and skills. Left is from using a save from the old version, right is a full play trough on the current version. 
Fun game indeed, the further i dig, more i keep finding.
If you follow the advice given and wait for things to pass [...], the full event plays and stays in a dark screen mode. After the event ends the player can not open inventory to fix the dark screen issue with the given tool. Player can still walk around but even exiting the Twilight Ruins keeps the screen dark and inventory locked.