1 phone NOT showing Arrive/Depart....just Present?

1 of our 3 phones shows arrived 2 days ago but doesnt update anymore when it Departs / Arrives, therefore not Arming/Dsarming system. Stays in Present mode.

What can I do, do I have to remove his phone and resend invite to account?

Thx.

Not trying to hijack this post, but I just started having similar problem. I use the smartthings app for arm/disarm. My wife went to work this morning and alarm armed, but i am still home and it shows that i am present. I have double checked app settings and all looks correct (everyone leaves and someone arrives…)
I also arrived yesterday and alarm did not disarm, even though it showed my arrival and presence.
Hopefully someone may have some tips as to what may be the problem.