changes in Rig settings will not be stored in the rig ??

I noticed yesterday at the rehearsal that it is not possible for some rigs, to save the changes of input sense and rig volume. After the write / replace operation that runs without errors, changes in rig volume and input sense are not stored in the rig. The sense input is not locked with the lock function.
Changes to the stomps (eg on / off) are stored in the rig.
When I save the rig under a different name, I can change the rig volume and the input sense and these changes are stored in the rig ...
I installed the 1.5.4 release.
I'm stumped ...

Kind regards
Micha

The Input Section is not locked.

Today I have noticed in connection with the issue described an unexpected behavior in the rig browser and can also
reproduce this by switching on and off of the KPA.

KPA turn on
Midi PC 15 to select -> 61 Bassman clean (Author And44)
Volume changed from 0.0 to 1.0, D Stomp "On"
store -> replace
Midi PC 14 to select -> JCM800 Sweet (Author And44)
Midi PC 15 to select -> 61 Bassman clean (Author And44)
Volume = 0.0, Stomp "D" OFF -> changes were not saved

Now I want select another rig in the rig browser - (Browse filter "Current Author " is set at the start).
turn Browse Pot but it just shows one rig (bass man 61 clean), even though I have saved a lot of And44 rigs in the KPA.
Browse filter change to "All Rigs"
turn Browse Pot - I can browse through all the rigs.

Browse filter change to "current Author"
Now I see all And44 rigs.
Midi PC 15 to select -> 61 Bassman clean (Author And44)
Change volume and other settings.
store -> replace
Midi PC 14 to select -> JCM800 Sweet (Author And44)
Midi PC 15 to select -> 61 Bassman clean (Author And44)
All changes are saved .

It seems to be a context with the failure of the rig browser ?