Yes, but we have 14.0.0-B1 on both sites - dev and production. Also cleared cache several times even manually by deleting everything from "cache" and "cache_public" folders

Strange. Check the update and module logs for traces, what could have gone wrong.

I already did that and no errors or warrnings in .../logs/updater.log . As for the ".../logs/upgrade_modules.log" it hasn't log from year 2018. It just doesn't logs although I always upgrade modules when update/upgrade is available....