Vaadin23 + Push + SpringBoot on Wildfly

I have an application running under Wildfly 21+.
Sometimes the application log is full of messages like

UT010026: Async is not supported for this request, as not all filters or Servlets were marked as supporting async```
Might be it happens when session is dead or on network re-connections, I'm unable to find out.
Error description shows there is some filter with no ```<async-supported>``` configured.
But configuration has no web.xml and there are no extra filters as well. 
Full stacktrace is attached.
Any suggestions will be appreciated.
Thanks in advance.