I haven’t test MyCanal with PPM (i will and after i’ll answer you)
But i have the same problem with my xiaomi laser projector.
I think that it is because it isn’t the app is download through aptoid (and isn’t the official one)
And perhaps in the future you will have the same problem with Netflix, prime video…
That’s why an android TV with play store is better than a “homemade” version of android
I also have an issue with the OCS app. I can launch it from the dashboard, when I click on it, the dashboard is refeshing without opening the app. I have to go to the store, make a search for OCS (it’s not in my installed app list) and choose « open ».