I don't think it matters which version you're on. This bug started for me with the first unpatched version.
If I have the entire party selected, it moves everyone as slow as my player character, so even with fast mode selected, it looks like the game is running on normal speed.
If I select and move characters individually, my PC lags far behind, 3 people are slower than normal, and 2 turbo ahead of everyone else.
Would it be that hard to do a stat/status sanity check after every load, area change, or rest? It seems like these bugs with permanent blind, movespeed changes and stacking effects are popping up everywhere.