Was there ever any update to this or workaround posted?
"These objects are being reimported every time we leave play mode. This is causing some of our AssetPostProcessors to fire, which compounds and increases the time it takes to enter and exit play mode"
This is absolutely killer... we're having to wait 6 MINUTES before being able to test and play now.
Please let me know if you managed to find some way around this @Bryant!
Best,
craigz