AreaID always seems to be empty during the first PIE session after hot-reloading.
Only able to test in Dev-Framework CL# 3221683 due to the licensee's project being created in 4.15 and not being backwards compatible.
Result: Notice that Area-Flags is empty in the log
LogTemp:Warning: SUCCESS ! PATH
LogTemp:Warning: [0] : flags 81665 : area-flags 1 : customlinkid 0
LogTemp:Warning: [1] : flags 768 : area-flags 0 : customlinkid 0
LogTemp:Warning: [2] : flags 81666 : area-flags 1 : customlinkid 0
Expected: I'd expect to see the same results as the second PIE:
LogTemp:Warning: SUCCESS ! PATH
LogTemp:Warning: [0] : flags 81665 : area-flags 1 : customlinkid 0
LogTemp:Warning: [1] : flags 328448 : area-flags 5 : customlinkid 0
LogTemp:Warning: [2] : flags 81666 : area-flags 1 : customlinkid 0
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-39637 in the post.