By analysis the log, seems the following 3 calls has been ended by system callkit (Not mainly trigger the end call):
@apple Do you have similar report that the iOS CallKit End the call withtour user action?
Device info:
iPhone18,1（iPhone 16 Pro）
iOS 26.2
RCAppMobile/25.4.30.995 CTRadioAccessTechnologyNR（5G NR）