Recently headset busylight not clearing after Teams meetings, but behaving correctly for 1:1 calls

I've long used call controls and presence with my Jabra headset & Teams, however recently I to started having the problem of either MS Teams or Jabra Direct not clearing the busylight status following the ending of Teams meetings. I've isolated this down to be Teams meetings specifically, if I call a colleague directly the busy status will clear correctly, but if I dial a meeting it will not clear.

Likewise if I do the Settings/Devices/Make a test call, it reliably turns on the busy light then turns it off when the call finishes.

I use a Jabra Evolve 75 headset, the latest version of Jabra Direct and MS Teams 1.6.00.1381 (64-bit), on Windows 10 Pro.

When its in its busy status, call controls continue to function reliably, if I make a new call. And if close Teams and Jabra Direct, the busy light status clears, until I make another call where it goes busylight again as it should. So strangely all is functioning, except for clearing busy status after hanging up a Teams meeting.

Following reading other reports on forums, I've tried; Rebooting. Disabling microphone permissions from Windows 10 Catana search. Manually disabling & re-enabling busylight. Upgrading "Intel Smart Sound Technology for USB Audio" divers. Then later disabling Intel's USB Audio, and rebooting. With no change, the busylight still doesnt get cleared from Team's meeting.

Any ideas for further troubleshooting or whether this is a known bug? (it didnt used to be)