Sitemap selection remains empty in iOS app

Hello everyone, since yesterday I have linked my Nanoleaf lights in Openhab and made it visible in my sitemap. I’ve also added the effect parameter via a Selection in the sitemap.
The problem: All choices/scenes from the Nanoleaf controller are neatly loaded via the sitemap in the browser, but not in the app (list remains empty).
Does anyone know if there is a fix for this, or is this a bug in the iOS app? I am using Openhab 3.3.0 with app version 2.4.52.

Selection lists that are defined manually are loaded correctly in the app.

Items (adress hashed out for privacy):

String NanoleafWkEff "Effect" {channel="nanoleaf:controller:##########:effect"} 


Selection item=NanoleafWkEff icon="nanoleaf"

In the brower it looks like it should be (scenes are loaded from Nanoleaf):

In the app it doesn’t, list remain’s empty: