Memory Leak/Preformance Issue

[Ryseria]

Had this problem since launch, after a few hours the game will start to freeze up and monsters will appear invisible (once it happened in the start of Turn 8 and the floor was invisible, and then in Turn 9 and the blue markings were gone), then it crashes. Since the patch it has been worse though, it used to take a long amount of playing the game at once to make it crash, now it's completely random had it happen in 30 mins and then not for 5 hours...

This happens to me too. I begun noticing it since around patch 2.28, but it's getting worse in 2.3. I'm using Radeon HD 7800