CHIRP

Hi,

UV-5R firmware messages:
HN5RV01
1

I just tried programmed my UV-5R with CHIRP for the first time, and now my device exhibits some odd behavor: when turning it on, I get the "Welcome" message and can hear "frequency mode". Immediately as the device presents the current frequencies, it enters TX mode and stays there. Pressing keys plays a tone (as usual when in TX), and pressing the PTT button does nothing.
If I connect a headset, the device goes out of TX and behaves as it should: pressing the PTT on the headset enters TX, and I can transmit and receive just fine.

I've tried programming it a couple of times (also with an image from my other working UV-5R), and every now and then it seems to revert to a "good" state where it works for a while - but after some time it seems to randomly revert to constantly transmitting. I'm also having a hard time programming the device: it rarely succeeds, getting "Radio refused to accept block x" most of the time (as described here: https://chirp.danplanet.com/issues/5107#change-15543).
I did notice that my working UV-5R has another firmware message 2 (1FB297 instead of just 1), and CHIRP warns me that other settings aren't saved since "HN5RV011FB297 " and "HN5RV011\xFF\xFF\xFF\xFF\xFF\xFF" don't match.

I wanted to try with a "factory" image as described on miklor (http://www.miklor.com/uv5r/UV5R-Recovery.php), but there doesn't seem to be an image matching my firmware version.

Any advice?
Thanks in advance.