The currently reported bugs are as follows:
Bug where the daytime background is displayed when going to the beach on Saturday or Sunday night.
Bug where an empty message window appears when stopping penetration during an H-scene.
Bug where voices cut out after about 30-40 seconds during fellatio or irrumatio.
Bug where voices don't play correctly if you interrupt fellatio or irrumatio and restart it within 2-3 seconds.
Bug where the screen goes dark when an H-scene ends due to sensitivity increase under the following conditions:
Conditions: "First climax of life study not yet unlocked" AND "Affection level is 13 or below OR 26 or above" AND "Has finished reading 'Manager's Secrets' (from 'Reading' activity)."

Temporary Solution: Click near the bottom right of the dark screen a few times. The UI buttons are still active, so you'll be taken to another screen and the display will return.

The cause of this bug is known and being fixed. An update is planned for next Monday to Wednesday.