Invalidation of the session results in weird behaviour

Jmix 2.1.1, when I go to active sessions and I invalidate my on session (the same probably happen when I do it for another user) and wait, I am redirected to http://localhost:8080/VAADIN/push?xxx) that then displays
Could not navigate to ‘VAADIN/push’

Available routes:

If after having invalidated my session, I click on refresh button - before being redirected to VAADIN/push, the UI hangs for a long time, then I have the following text shown in the client browser
55|for(;;);[{“meta”:{“async”:true,“sessionExpired”:true}}]

If I simply return to http://localhost:8080 I am logged in again (as my session in Keycloak is still valid).