Iphone X multiple dropped calls since IOS 12.1.2

I’ve been getting more dropped calls in the middle of conversations, call failures, since the last update of my iphone X.

Yes I use wifi calling as there are dead spots around my home so I need to have this working and this wasn’t a problem in the past with previous apple devices I’ve had. But even so, the drop calls are happening outside of my home now, in different areas.

Sim card has been updated.

(I’ve seen the workaround is to turn off wifi calling AND LTE under voice and data putting it to 3G) which defeats the purpose of having a device that supports LTE in the first place.

Could Apple please push an update that will fix this?