Crash with SFX Block [1.12.2]

[mxnmnm]

I'm not sure if this is important enough or not for a fix, but I really hope that it is. I was just scrolling through the options in the sfx block and boom crash.

Here's the report: https://gist.github.com/mxnmnm/d7c77b571c68452e685bc0eab98af9e4

If you need more info let me know.