IMAP synchronization 10.0.3530 (f0b89b7)

I have a problem with IMAP synchronization. Mail is received and sent correctly but the program constantly shows a synchronization error. I reported the problem to the hosting provider (email) but they do not see the problem.

17:45:27 JMP TELEFON [IMAP] MailClient.Accounts.ConnectionException: Synchronizing folder ‘JMP TELEFON/Inbox’ failed due to the following error: Lost connection with server
—> MailClient.Imap.Base.ConnectionLostException: Lost connection with server
at MailClient.Imap.Base.Extensions.<>c__DisplayClass30_0.<g__SlowAsyncPath|1>d.MoveNext()
— End of stack trace from previous location —