Zwift crashes [v 1.0.55226] SOLVED

Hi - I bumped into crashes today while joining group ride “GRIT Group Ride - Mountain Route (B)” at Watopia. It happened at 37:38 when I switched viewing mode. The app abruptly finished without any messaging. I was able to rejoin the ride after restarting the app, but it happened again at 57:45 while on the way to Epic KOM (without any operation this time). This is the second time I encountered Zwift issues - the last crash was yesterday while at Revo Social SUB2 (D) at London. I started Zwift since May and it has been fairly stable - since I installed 1.0.055226 a few days ago. My Zwift is on WIndows10 x64.