HRM Dual connecting to app but not displaying BPM

I'm having the same problem as well. I can connect the HRM dual to my iPad, my husband's iPhone, and to my Concept 2 rower but it doesn't work on my iPhone. I tried removing the Garmin Connect App but it doesn't seem to work still. I tried several heart rate monitor apps and it detects the HRM dual but it doesn't show the actual heart rate. 

In the meantime I got a feedback from Garmin. "They are aware that some users are experiencing this problem and they are working on a solution". Let's see how long it takes.

I have an issue one step back using an Android Device. I have a new HR strap and I need to connect to the app but I do not see the button there was in the previous version to add a new sensor. 

Where I can find it? 

I am using Any+ HR strap and I used more times with this smartphone and Tacx app with the old one that was identical. 

There are multiple threads about this issue.  One or more people said it started with an iOS update in Nov 2020 on newer iOS devices.  Older iOS devices can receive the data flow from your HRM Dual.

I had this issue on my iPad.  Solved by forgetting device in bluetooth settings and adding it again.  It seemed like it may have set up a second Bluetooth connection, but I couldn’t really be sure.

I don’t have a Tacx Neo, but do use an iPad and an Edge 830.  There are multiple threads with people describing this same prob., starting with an iOS update in Nov 2020.  A workaround was posted somewhere, saying that older iOS devices will receve and display HR data.  That suggestion worked for me.  I think Android maybe doesn’t have as many of these problems because it’s an open standard, but of course Apple severly limits what publishers of partner apps can see of iOS code.

I started this thread in September/2020, so for me the Nov iOS update didn't impact me at all: it didn't fix the issue I already have, and as of yesterday I still have the issue.

Same with me and it just started today for some reason.  HR works in Rouvy so a Tacx issue.

same issue for me : -Dual coorectly connected to TACX application but no BPM data displayed. It's quite annoying , when  you buy the same brand on different  materials  , you expect perect compatiility !  any date from Garmin to fix the issue ?