Hi there! 
I wonder do QGIS Desktop version should be or has to be the same QField (qgis_version variable)? I’ve also noticed a common QGIS notification about newer version after importing project freshly created in the field but simply think does it have affect my work in QField
What about historic transition from 3rd to 4th generation of QGIS in this context?
There was topic touching that matter in some other case.