Qubino Flush Shutter Operating mode not persistent

I have a Qubino ZMNHCD1 flush shutter relay. I want to change to operating mode from shutter mode (default) to venetian blinds mode. (Parameter 71)
I change the setting in the app, save it, and then exclude the device, wait a minimum of 30 seconds and than include the device again. As per instructions.
However, after doing this the operation mode is back its default (shutter) mode! I have tried this several times, and also done a complete device reset, and then tried it several times again. But parameter 71 doesn’t seem to stick.
I am using a Homey Pro version 3.1.0 and the Qubino app 3.0.2

Can anyone give me advice or a good tip on how to handle this?

If you exclude the device, you reset the settings.

Include your device, change the parameters and that’s it.

This is contrary to what the manual of Qubino tells us, but it works!!