Somfy Tahoma blinds forget position

I use Somfy Tahoma blinds which are integrated using the overkiz integration.
All blind show up in HA and I can controll them using the buttons as well setting a individual position.

However, it seems that the blinds position is not saved. When displayed in an entities-card they always appear as open.

In the following example, the office blind is shown as open when in reality it is closed. In order to open it, I have to press the “stop” button, only then the “up” buttom becomes active.

Also when I check the position of the blinds, all blinds’ position is reported as -24%

Thank you for any help