Jabra recommended to open a ticket with Microsoft. Thier response was:
"The problem seems to correlate with an MS Teams challenge we've been having recently. An update seems to have caused Teams to stop sending call ending signals to our headsets, resulting in "phantom calls" staying open which stop functionality to other devices.
As a temporary workaround while Microsoft works on a Teams Update, please try the following:
- Open MS Teams and enter the Settings menu
- Go to Devices
- Make a test call
- During the test call, click End Call
- Test the device after this to see if functionality is back to normal
If this resolves the issue, use this as a short term fix while awaiting Microsoft's update. We also strongly suggest opening a ticket with Microsoft."