My android system when I push just the Tv button and hit power it shuts down both and turns both on. I have 6 54.3 remotes in use and they all do the same thing, I don't know weather it's just some people that there remotes are this way.
I think the 3 light do not blink is because it is already unpaired, if you can get to the diagnostics screen on your J4 then try to pair by pushing the sat button.
I just uninstalled HBOMAX from my H+ and reinstalled it and reactivated it through provider [Dish credentals] just to see. I would think MyDish will be back shortly. Fingers crossed
I will give you another suggestion if tomorrow you have your problem leave your tv and WJ4 on no unplugging then call Dish to have them look at this from there end.
I haven't used the tools reset I have always used the one in the google menu it resets everything Dish and google, just be aware you may have to call dish to reactivate that WJ4. It's been known to happen. Good Luck