WC3 TFT freezes mid-game


Recently my WC3 TFT randomly freezes and then kicks me back to summary page and bac to clan channel. I do not disconnect from battle.net - I can still join and whisper friends immediately.

The actual map / game continues to play but I cannot select my hero. For those 5-6 seconds people are messaging me why afk etc.

I have found similar post here https://us.battle.net/forums/en/bnet/topic/20772497063

Anyone help please? Have already installed / reinstalled.