Max 3 does not regognize headphones plugt in via OTG USB-C to audio adapter

My Max 3 does not regognize headphones plugt in via OTG USB-C to audio 3.5 adapter. That means that audio is just playing out if the integrated speaker of the Max3 even if the headphones are plugt in. The same adapter is working on my NovaPro and if I remember it right it once worked on my Max 3 too, but this was before the last update to the version: 2019-12-11_16-47_2.2.2_b15be06.
Is an update coming which will fix this problem?