3.3.1 freez on delete ussers from ACP

[AlexandrBu]

Hello

I have updated from 3.2.9 to 3.3.1 and has noticed some problem

On ACP in Prune users i find users with 0 posts and choose delete. Not much users 5-10.
After press delete i got 504 error, i see all php-fpm process are gone, cpu loads jumps to max, after 5 min all is back to normal

What could it be?

Database server: MySQL(i) 5.7.29
GZip compression: Off
PHP version: 7.3.21

- same on posting (but without error 504)
elevated time of response and CPU load jumps