RST-135. Internal guider does not reuse calibration.

RST-135 mount.
Internal guider does not reuse calibration despite the fact that “Store and reuse…” option is selected.
I am not 100% sure but think it did work before.
Am I missing a check mark somewhere?

The “Store and reuse…” option didn’t work right for any of my mounts until recently.
Now it works just fine with HEQ5.
Wanted to try with RST-135 but it recalibrates every time the guiding is stopped/restarted.

Recent/current stable release of 64-bit SM/KStars. Everything is running on RPI.

Thanks!