I played 1.5 weeks on PS4 several hours a day without any severe bugs. It was great.
However, since yesterday the game is becoming unplayable:
1. Invisible bankers
I cannot always access my bank anymore, because the banker is invisible.
2. Invisible guild traders
I cannot always visit guild traders anymore, because the traders are invisible.
3. Invisible enemies
Some fights are impossible to win, because the enemies are invisible.
The invisible enemies hit me with spells, but my spells do not see them.
4. Invisible quest NPCs
Some quests cannot be continued because quest NPCs to meet are invisible.
This even happens after a fresh start of the console and the game.
I think there may be an out-of-memory/cashing issue.
Perhaps I visited too many places and the internal memory/cashing of the game cannot cope with it anymore?