Hi, I solved the problem. I have to confess that I didn’t read the user manual exactly. I didn’t consider that I have to change presets (or press any button) to store a preset. If I switch off the unit before doing this, the last settings will not be stored.

With the EHX supply it Unfortunately doesn’t work consistently too.
When plugging the supply cable in, there is a short “message” on the display: r03.