Where have my Intensity Minutes Gone?

I wish I could remember exactly when this happened, but sometime over the last couple of months my Intensity Minutes using my Edge 1040 and HRM-DUAL have gone to zero.  I know that there are other threads on this subject, but none of the "solutions" have worked for me.

I ride my TACX trainer at least 5 days per week and I used to get 500 plus intensity minutes, but now I am getting exactly zero.

My 1040 has the latest Beta firmware

I have a Garmin Venu 3 that I don't wear when cycling (on the trainer and outdoors).

If I take a walk, not leisurely, but not a run, I pick up a few intensity minutes (using my watch).

Is there a setting on my 1040 or in Connect that I have inadvertently changes?  This is really bothering my especially since it affects my health stats so I really don't know what my true readiness is.