Problem with refix wall/gran

Hi everybody,

currently i am trying to simulate a bucket elevator. I am interested in the forces on the buckets.
To speed up the simulation i import the buckets as soon as they are needed. Therefore I have to unfix and refix the meshes with the wall/gran fix.

The force on the buckets are written to a file with the ave/time fix.
If I take a carefull look at the results, I can find a jump in the forces every time i unfix and refix the wall/gran command.

Attached you can find a testcase:
In the first simulation i dont unfix and fix the wall/gran (File in.test001 line 108 & 109).
In the second simulation i unfix and fix the wall/gran (File in.test002 line 108 & 109).

The results could be found in the folder post00x/data_becher.csv
If you compare both csv-files you can find the "jump" of the force on line 304. For example the Force in z-direction nearly doubles.

I am not sure if its a bug - but i couldn't find any workaround.

Are there any suggestions to avoid this jumps?

Best regards,
max