heyy
Ok, this is weird but ill try to brainstorm....
- try to use use safari (works better with touchbar)
- try to boot in safe mode: https://support.apple.com/en-us/HT201262
- contact apple to see if it is a hardware failure or something... don't be soft on them.. you paid more than $2500 on that machine, you want it to be perfect....
so if this helped please rate this as useful..
good luck
-dennis rodenburg