Bluefruit M0 doesn't reconnect after update

[AgentMC]

My Feather is flashed to be a keyboard with minimal changes from "hid keyboard" example.
I have updated my Feather M0 to 0.8.0.
After that I see the following behavior connecting to Windows 10:

1. Initial connect - fine.
2. After device reboot or Windows bluetooth OFF-ON, the device begins blinking blue with random intervals from around 200 ms to 3 seconds, and Windows mostly shows "Connected", sometimes changing to "paired".
3. Whatever Windows shows, keyboard doesn't work.

I'm trying other firmware versions so far, but maybe you have any ideas on what this is?

[AgentMC]

P.S.: the only way I found to resolve the issue is to turn both Win bluetooth off and device off, turn windows bluetooth on, then remove device, turn device on and reconnect.

[AgentMC]

Rolled back to 0.6.7 and it works now. There is a delay of about 5-7 seconds between the blue LED lights up and Windows starts accepting keystrokes but anyway it's better than nothing.

[Joylight16888]

I faced the same on and off connection problem on version 0.8.1.
No cure?

[photomattmills]

I was having this same issue, but it cleared up for me after a factory reset. I first tried all the different available firmwares in the bluefruit app, with no success, so it may not be the same issue, but anyone out there that has this problem, maybe give it a shot.