VM indicator dissappears after about 60 seconds

[Joe Diamond CPA]

Hi everyone, running incredible pbx and all of a sudden TODAY when i get a VM, i get the VM indicator on my bria mobile and grandstream desktop phones, but after about 60 seconds they dissappear! even though the VM is still in the system? HELP!

 

[Joe Diamond CPA]

ok now it reappears after some time, then again dissappears again???