Just had my CEL the other day. Dealer said they got the bulletin Oct. 5th for this issue. They said the code can be pulled from history for this problem. Don't remember the code he specified but my truck had it. They are ordering me a new ECM.
For clarification I bought my 2020 TB Custom in Feb, had issues from Feb-April, then it went away. On Oct 14th I had crank but no start with key, then was able to start with remote. On Oct 23 I got a CEL and it went away the next day.
I will try to update.