I just got another KP on a fresh Mojave install....
Did they basically tell you "we can see by the logs your computer crashes all the time but because it didn't happen now we won't do anything to fix it " ?
Complicated cuz I brought it in having JUST installed Mojave, they basically said bring it back if it happens again. I haven't gotten one yet myself but of course it's going right back if I do. It was disheartening that Apple has no procedures or even acknowledgement of this issue for Genius Bar techs. Basically, whatever this issue is, it's 100% opaque and non-user diagnosible and that's incredibly frustrating. Like a bunch of you, I'm a ""super user"" and I've brought my computers back from the brink many times with my own diagnosis and fixing skills, but you just hit a wall so quickly with this. It's a check engine light. They were nice and did believe me and did encourage me to bring it back, not so encouraging on a replacement.