Earthmate Messages only received from ''Unknown''

Hi there,

We're running an anti-poaching operation and our InReach Explorer+ are the only method of communication that we have with our rangers out in the field. Since a couple days, all messages received from different teams on our tablet that has Earthmate installed, come in as ''unknown". So we receive the messages they send, but username doesnt pop up. I don't know if this has to do with the firmware but this was recently updated. Hope someone can help.