In 5G NSA, I can see UE was frequently released due to other along with idleModeMobilityControlInfo, then RRCConnectionRequest again at the same band with establishmentCause highPriorityAccess.
Do you have any idea why UE need to be released?
Seems there was no any events initiated before the release.
There is such scenario but that will work to move user from non-anchor to anchor layer.
In this case UE was camping on anchor layer.
Also LB is not active.
Check with sub6 frequency what assigned for that site and check coverage that carriers if LTE coverage dominant to 5G that happens so downtilt LTE carrier (sub 6 frequency one), that time UE survive most of time in 5G and control UE releases frequently.