Hi,
I've seen the other posts on failures in calibration on this forum (hopefully all...) but it seems my case is different.
I have 11 Shelly 2.5 configured as rollers (and many other 2.5 and 1 as relays). All but one work perfectly! I also have the same roller motor type on all rollers (and they all ~2 years old).
On one specific roller, Shelly worked for a while and then 'lost it' (literally 
)
1. on the internal web site, there is a message "Тo open/close partially go to the settings and do a calibration" instead of the scroll-bar
2. Doing a calibration process doesn't solve it
3. Following options 1 & 2 on this post did not work
4. I also have the following situations when operating manually from the wall's momentary switches -
a) when clicking once up, it stops ~10 cm before fully open
b) clicking up again goes to fully open
c) clicking down from fully open just sounds the engine for a second but nothing moves. It takes another couple of intents to make it start moving down.
d) it then stops the down move at ~90%. another click down makes it close to 100%.
On all movements I can see the Watts change on the web site.
I've also done a factory reset and the FW is latest.
I'll appreciate any help understanding how to fix it or if the module is defected.
