Elddis Accordo 105 HPC levering problem (1 Viewer)

[ARTPLUM]

I have a Elddis Accordo 105 which has a HPC-Hydraulics levering system on it when you use the auto settings it’s fine but when you use manual it’s very aggressive and when you let go of the button on the app on your phone it stops with an almighty bang and shake the van has any one had the same problem HPC are saying it’s because it’s less than 6m in length hopping some one else is having the same problem.
Regards Arthur.