hi! I have the same problem as a a few other commenters here.
when I try to interact with smth/open the dialogue that has more than 1 talk sprite, the game and my phone lag and slow down really hard. it stops after I finish reading the dialogue, and doesn't happen if there is only one talk sprite on screen, like the Reina's interaction that leads to her shop, or the omnic at the entrance to the dorm.
fyi I was using the save that was made a few months before the update, I've tried to clean the cache and to reinstall the game but it didn't help. I'm using Poco X7