the game will soft lock
- have nesting grounds on the battlefield.
- cast a creature with an evergreen ability.
- pw walker is an not important detail.
I will try to get a video and submit. @Oktagon_Support
Hello @Julie71,
Thank you for all the information provided, this issue will be investigated!
If you have any additional information that you consider relevant, please don’t hesitate to send me 
Rebeca.
I had this happen on my first match I played in the Rising Tensions that finished yesterday. It did not seem to happen in any subsequent matches though. I was playing as Brokahn in RT top node with no creatures out before this turn, I used his L3 to fetch 3 tarrasques,
made my swap, cast goblin morningstar which rolled a d20 and summoned a
goblin, cast 3 tarrasques, tarrasque attacks (they get haste, goblins did not have haste) then the game stopped responding.
This happens regularly for me. So regularly that I no longer use Nesting Grounds at all since it seems to lock every time I do.