What tool do you use to debloom your frames?
I tried to install the plug-in for CCDSoft but haven't gotten that to work as of yet (i.e. the plug-in isn't recognized).
Then I used DeepSkyStacker, gave it no calibration frames and saved intermediate files (*.cal.fit) and that seems to debloom them suitable for use in PI.
Here's to hoping it's a 'check-box' in PI soon