dual sim drop signal

I have dual sim setup on my iPhone 11 Pro with iOS 14.3

eSim for my main line(calls, messages, FaceTime, etc...)

Physical sim as data only (it has data package without any voice features).

I setup my iPhone to use physical sim for Cellular Data with “Allow Cellular Data Switching” Enabled.

the setup works perfectly and when I lose network on the physical sim, the data switches automatically to the eSim data.

The issue I have is while receiving or doing a call on my eSim. The physical sim drops signal completely after few seconds from initiating a call or receiving calls on eSim. As soon as I end the call, the physical sim gets the full signal.

This happens all the time, so it’s not occasional.

I tried different physicality sims, I’ve done network reset but still the same issue. I got this issue from the start even when I was on iOS 13 till my last update to 14.3 the issue remains.

I was wondering if anyone can help or faced such issue and got it fixed.