Fix potential state reset when trying to join a room

[S7evinK]

When trying to join a room in short sequence, it is possible that a state reset occurs.

[codecov]

Codecov Report

Patch coverage: 56.25% and project coverage change: -0.18 ⚠️

Comparison is base (f956a8c) 66.38% compared to head (781b38f) 66.21%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3040      +/-   ##
==========================================
- Coverage   66.38%   66.21%   -0.18%     
==========================================
  Files         499      501       +2     
  Lines       53799    57587    +3788     
==========================================
+ Hits        35715    38129    +2414     
- Misses      14533    15739    +1206     
- Partials     3551     3719     +168     

Flag	Coverage Δ
unittests	49.98% <56.25%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
clientapi/routing/routing.go	61.72% <56.25%> (-2.40%)	⬇️

... and 195 files with indirect coverage changes

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[kegsay]

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