Game freezes against serprexalt's Arena 2 deck

[elenchus]

I am not aware of why, but for some reason, the game occasionally freezes during the opponent's turn in games against serprexalt's Arena 2 deck.

Screenshots:

Spoiler for Hidden:

(Text is missing in the screenshots but not in-game.)

[serprex]

What's the deck you're using?

edit: reproduced

https://github.com/serprex/openEtG/commit/39b2e01e907d50789cf912c6af8d24cebf4aa281