what is my other device when I get "Please check your other device" (am I the host)?

[OlyPenWriter]

I have a Pro subscription. I host a meeting three times per week. Occasionally, it's as if I'm not the meeting owner of my meeting. 

The main way to tell when this is happening, is that I am unable to start the timer. When I click Apps, I am asked to purchase a package of apps. Then I check to see if I'm the host by checking to see if I can assign someone else as the host and that isn't an option.

I try going into my account and at login, I'm asked to "Please check your other device." What device is this? I've tried checking my phone, my email but there's nothing there. Has my account been hacked?

I've had non-host attendees that have been able to access Zoom features that I appear to be locked out of... AGAIN, this is an intermittent problem. What is going on?

[storyhub]

If you open the participants list and your name is not followed with "(Host,me)" then you are not the host. If you connected to the meeting using "Join a meeting" instead of "Sign in" you will not be the host.

[OlyPenWriter]

I typically join from a meeting link and automatically become the host on arrival on my laptop, desktop, or phone. I'm assuming that sometimes, I must get logged out of my Zoom account (not on my behalf) which is why I'm not the host. 

When I am and I'm trying to correct the situation, do you know what this message means? Or is it just a nonsense message that has no meaning? "Please check your other device."