When entering the server, kicks

[Wright111]

Sorry for bad english. Text from translator


I go to the server, sometimes the ping is 2500, sometimes the usual one is 70-80. After entering the server, 15-20 seconds pass and I get kicked with the error "Connection to the server is lost".
What could be the problem?
Attached video link.

https://youtu.be/HP5JJNGYe7w