Any results yet? Assuming not?
Can't say that I have the same issue but I'm adding mine anyways.
Similar to what everyone else is describing, except my game runs very smoothly and then will randomly spike to very little fps, then back to normal. After about 2 minutes of runtime, the game entirely comes to a halt and I get these spikes a second between each other with a small time frame that I can move around smoothly before it returns.
I won't confirm if its correlated because I have a computer that's comparable to an attic so it might be my computer entirely. I tested this (on a plethora of game crashing events) and 1.13 is the clear candidate. Doesn't lag anywhere from 1.12.2 or less.
Megan said that he's tried multiple reinstallations so this wouldn't help.