Nextcloud Talk delay call on PC

Hello. There is a problem with NextCloud Talk on the local network. PC user1 calls PC user2, the call notification arrives after 20 seconds. The call at the same moment arrives immediately on the phone to user 2. That is, there is a delay of 20 seconds on the PC, there is no delay at all on the phone. What can be done?

Everything turned out to be done, Redis was installed and connected, Notify-push also works without problems and there are no errors. But calls to customers also come with a delay