I press training mode and it joins a ranked game...

Sometimes after i play a mode and I go back to the lobby and select a different mode and ready up, it will join the previous mode still. I really hope this problem isn’t on my side and it needs to be fixed. For instance, I accidentally joined a ranked match when i selected training, went AFK for a couple mins and come back to me losing rp when I should be just standing in a cave holding a p2020.