User's getting logged out using Phone but not Desktop version

I have a typical Meteor application running on an internal company server that uses the Accounts package to handle approved user logins.

We are experiencing logged in users getting kicked out of the app and sent back to the login screen when accessing from a mobile device.

Desktop users are not experiencing this issue.

We have seen where the loginToken in LocalStorage of iOS/Android browsers is getting cleaned up/deleted on some devices when the device is locked, but not all follow this pattern.

Any suggestions?

Thanks in advance!

This might be a good read.