Battlegrounds laggy & unresponsive since last patch

Ever since the last patch Battlegrounds has been extremely rough to play.

Towards the end of the buy phase when the timer gets down to around 5 seconds the game will go unresponsive before loading into the match, meaning you lose the last few seconds of your turn.

It also goes unresponsive briefly when going from the end of the battle phase to the next buy phase.

Tonight I had a match wherein I had just tripled a card with around 6 seconds to go in the round and went to play it but the game went unresponsive & I couldn’t play the card on my board. Not surprisingly I lost the next round (whereas I would’ve won had I been able to play my gold card).

The game never used to do this before the most recent patch.

I always make sure my graphics drivers are up-to-date and I’ve also done a scan and repair of the Hearthstone game files so it’s not anything to do with either of those things.