Issue with sentry cam remote view via cell signal

On the Model 3 or Model Y, both with Premium Connectivity, remote sentry cam view does not work on my Android Samsung A50 via cell signal to either vehicle. Cell signal isn't an issue given YouTube and Netflix work in the car and test upload speed via browser shows there's enough upload bandwidth to stream the low quality stream. On wifi at home with both car and phone on same network alone it works. Both vehicles are on latest software version and Tesla app is updated to latest version on playstore. Is this another software update result?

I don't have an iPhone so cannot try with that presently. Is there something I should do to get this working on cell signal to make this work?