Hi Dear,
it is very hard to simulate the issue and i not getting the issue while i try to replicate the issue to the apple consultant who called me for support after raising a case, but my bad luck after a hour i called one of my friend thru 3rd party call app (Botim) and the next call showed my previous contact number , i m trying to find the logic behind this , sometimes same combination brings me the issue and sometimes not.
one thing i have updated to 14.2 now it is stable so far past 2 days no problem occurred and caller id issues seems addressed.
i will not conclude anything as of now i will keep monitoring for the whole week , i will update this forum and eagerly waiting to share my results in a couple of days.