Ryze Ult breaks LoL Replay

So I want to highlight a moment towards the end of the game where, as Tryndamere, I split pushed into the enemy base and won a 1v9. However, every time i'm recording it, when Ryze uses his ult (he uses it twice during the span of my clip I want to record and highlight) it freezes and crashes the client. So I can't record my highlight. I wish I can share my replay here so maybe someone can see what I mean, but as far as I know of you can only link highlighted clips. Ryze was using the Uncle Sam Ryze skin if that means anything. Please help because this was such an epic moment as one of my favorite characters