...what?

The 2015's were incredibly solid machines, I've never heard of an issue like this happening. I still daily my 2015MBP and the thing is an absolute tank where everything just works.

I would literally bet money that your issue is hardware, not software.

Edit: I realize now that this comment could be referring to running Linux on a 2015 MBP, in which case I'm a moron and we can just disregard my comment.

Yeah, it's Linux. :) macOS always ran nicely, and the hardware itself is great. I think if somebody more capable in Linux kernel/drivers' hacking looked into it they could fix it, it's just that nobody cares (and `rmmod brcmfmac && modprobe brcmfmac` is simple enough).