I’m using the MBP 2015 15" and had zero issues, and still don’t have any. What you posted is very surprising to me. 
I’d try disabling and re-enabling iCloud. Also try disable Bluetooth for a bit.
dimitarvp
mainlymortal
It was the built in internet recovery and I didn’t use the migration assistant. I had a few little issues when I upgraded from Mojave to Catalina (like right clicking an item in the bin caused a kernel panic every time) but the clean install is even worse.
I know I sound a little dramatic but I’ve had so many issues in such a short time that it’s frustrated me.
Since I bought this thing I can’t think of any improvements at all and plenty of things that are worse. Your experience is the one I wanted and quite frankly overpaid for but it’s not the one I’ve had. There are many more people just like me too.
fun2src
It happens to me, too.
Bug : login error with passwords containing ‘[’, ‘]’, ‘{’, ‘}’.
Spanish keyboard: ‘[’ → Option + [ …
AstonJ
I think if I ever got to the stage of having to do an internet recovery I would back up all of my files and then do a clean install 
Just make sure you have backed up everything you need because obviously once you format the hard drive it will be wiped clean.
I am just tweaking a blog post I made that can help with this 
AstonJ
dimitarvp
I am sorry you got the short straw. I suggest you go ask somebody at an Apple shop for diagnostics. You might get lucky and they can replace the machine with one that doesn’t act like that.
But I understand your patience has been thinned. That’s fine.
sribe
That’s thoroughly rare; either you have a buggy 3rd-party kernel extension or failing hardware (RAM would be my first guess).