There are persistent issues in 1.36 when joining lobbies of maps a client has recently hosted. While I have not investigated if different maps produce the same issue, it is persistent when joining the same map when one has just come from a played session from said map.
Issues are also consistent with said bug:
The ‘Back’ button grays out
The game client acts as if you have just hosted your previous lobby, with the exact same name, then immediatly throws you out of it.
Where it happens: Game browser when joining a custom map/game one just has hosted and come from.
Region: EU & Americas