Philip PAN08 level value on item not updated

[DataWorm]

My Blind controller Philio PAN08 (manufacturer: 013c, typ: 0001:0015, firmware version 1.2) always worked fine in Z-Way. It did not matter if I controlled it via Z-Way or manually on the device itself, I always saw immediate feedback in Z-Way and how the percentage value changed until blinds reached top/bottom position.

Now in OH2 with the Z-Wave Binding this does not work anymore. I can use the corresponding item without issues to drive blinds up/down or also specify the target level in percentage. But even in that case item value is set to target level instantly instead of showing me the current progress. When I control the blind manually I get no feedback. Even 10+ minutes later (polling intervall of Thing set to 10 minutes) I still see an old percentage value unrelated to the current state.

I added an Item to watch the energy consumption of the device. That one does actually update the value (also during manual control). So feedback from device is received but not the current blind position. The logs also just show the value updates for energy but nothing else. 2020-08-07 19:32:24.251 [vent.ItemStateChangedEvent] - BlindHMOffice_ElectricMeterWatts changed from 0.4 to 0.3 2020-08-07 19:42:24.245 [vent.ItemStateChangedEvent] - BlindHMOffice_ElectricMeterWatts changed from 0.3 to 0.7

Is it a (known) bug or am I missing something? Btw, tried the Item Update button in HABmin but in that case there was also just an update for energy shown.

[DataWorm]

I forgot: I tested on the latest OH2 version (2.5.7). Please let me know if I can provide any other helpful information.