Cell phone dropping calls with WIFI calling

I have been reading online blogs where MANY people are having dropped calls with WIFI calling on Xfinity mobile. I am having the same problem. I've worked through the issue and have found the problem.....BUT NO SOLUTION.

When calling on WIFI the phone will show XM WIFI. Calls go through with no issues. When the phone shows XFINITY MOBILE no WIFI calls will go through. The problem is that the phone will switch randomly between the two settings. Thus dropping your calls. I've worked with Tier 1, 2 and 3 people at Xfinity and no resolution. It happens with 3 different models of iphone and a Galaxy phone. I happens with 3 different modems. HEY XFINITY, THIS IS NOT A USER SIDE PROBLEM.

I've been dealing with this issue for a year now. I'm praying we don't have an actual emergency at my home because I'll have to jump in the car and drive a mile down to the road to call for help. XFINITY please work on a resolution, I'm certainly not the only person with this issue. 

Here are many examples of users with the same issue.

https://forums.xfinity.com/t5/forums/searchpage/tab/message?advanced=false&allow_punctuation=false&q=wifi%20calling%20drop%20calls