Sigfox communication stopped working (Invalid message sequence from Device)

Hello,
I was trying to find something about my issue:
Invalid message sequence from Device #1CF5B5: expected 1, actual 4095

By disengaging device in SIgfox backend I am then able to send one simple message with following error:
Break in message sequence from Device #1CF5B5 [0 inferior 4095]

Followed by generic Invalid message sequence from Device #1CF5B5: expected 1, actual 4095

According to Sigfox support this is issue of device internal counter that got stucked at 4095 in my case.
I have found few more people with similar error (stucked on another number).

Is this internal memory issue, HW issue requiring RMA or can this be fixed ?

Thanks,

Petr