Iphone XS max Dual Physical Sim - network issues when both sims are in

Hi. I am having an issue with my network connectivity when both sims are operational. The issue is not persistent, but every few minutes or so, the network drops on my primary SIM and boots up again. I have tried disabling the secondary SIM by not unlocking it at startup, and used only the primary SIM. This seems to fix the issue, but defies the whole purpose of having a dual SIM phone.

Does anyone have similar problems? is there a fix for it, and are apple aware of this issue and are working on a fix?

Thanks