backport: fix: handle join blocked events

Maximilian Fußrequested to merge
m.fuss/web-app:3526-backport-handle-joinblocked-events-to-v2-9-x into release/v2.9.x

fix: handle join blocked events

Closes #3526 (closed)

(cherry picked from commit 0f503676)

Closes #3526 (closed)

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