Remote resetting constantly when using volume pedal

I've a running setup since 2 years which hasn't changed over the last 6 month.

Currently I'm playing with the lastest versions of RigManager/Editor and matching firmware. The prior firmware (7.1.16) was almost stable except some rare crashes (mentioned in this forum by others).

After installation of the latest beta firmware 7.1.18.15853B the Kemper Remote resets a few seconds after moving a Mission Engineering pedal. The correctly configured volume control on Remote input 5 (expression) and 6 (switch for effect "D" -> Wah) does not work at first. Then the remote resets and the Kemper shows the Tuner for 5 seconds until the Remote is back.

If I hit the wrong board, please move

Addition to my above report:

When going to "System" pages 8/18 and 10/18 an trying to calibrate, I can see the delay in reaction to the pedal movements. When moving slowly it sometimes doesn't crash, when moving fast, crashing is reproducable any time.