Disabling Erg mode for Indoor workout

Is there still no way to keep the smart trainer in resistance mode when doing an indoor workout?

Today I started my workout, changed the trainer through Garmin Edge 840 into resistance mode from erg mode and all good for the period of that step.

But the next step instantly moved the trainer back into erg mode.

Why does it not keep whatever mode I am setting?

It's great that it changes the erg watts settings while I am in erg mode, but when I switch out of it, it shouldn't switch back.

I only found 5 year old threads about this issue. How can it be that this simple logic is still not implemented?