MME drops

Hello Experts

Facing one problem related to MME drops only, do anyone have any idea or observed problem like UE send new RRC request (mo - signalling specific) during ongoing procedure ?

Because of above scenario MME send the UE release command (to old connection) with cause code “release-due-to-eutran-generated-reason” as UE request another RRC (mo-Signalling) during ongoing call.
Adding more info that there was no change in cell/site/TAC or even TAU timer expiry where UE request to update the tracking area.

What could be the possible reasons for 2nd RRC request as Mo signaling during ongoing procedure ?