I came across this thread during my research and wanted to loop back:
I recently bought the latest 2019 16" MacBook Pro (OS v.10.15.5) and had this issue as soon as I booted it up. Unfortunately, when the computer reboots, my crash reports don't appear-- the "Report..." button shows up on boot, but it doesn't show anything and there's no report generated in the console.
I contacted Apple multiple times and we went through the usual suspects: remove conflicting software, reinstall OS, turn off Power Nap, reset PRAM/ SMC, create a new user and switch when putting computer to sleep.
I finally was connected with someone who researched the internal Apple comms instead of just going through debugging steps and she said this is a known software (OS) issue among Apple engineers that effects certain MacBook/ MacBook Pros-- She assumes the crash log issue is as well. It will apparently be patched in the next release.
I'm assuming in certain cases certain steps (i.e. Power Nap, reset PRAM/SMC) will remedy the issue, but if all else fails it's a matter of waiting for the next OS update. If that fails, the fix is ArchLinux and ThinkPad.