Windows 2.5.0 client causes 100% load on my server

Ubuntu Server 18.10
nginx 1.15.5
php-fpm 7.2.10
mysql 5.7.24
Nextcloud: 14.0.3

The second i launch Windows 2.5.0 client my server`s CPU load goes to 100% and it stays this way even without any syncing. If i pause syncing in client nothing happens, only after client is closed everything goes back to normal. No errors in nextcloud log.
With 2.3.3 client everything looks fine.
1234

Yes, thank you. I enabled Activity app for now and it solved the problem.