Exported PSD are flattened when opened by other programs

[nucleardirk 3]

Hello!
I have the problem that files exported as PSD are opened as flattened in the iOS version of Pixelmator.
If I export a file with multiple layers from Pixelmator for iOS to Affinity Photo / Designer (iOS and Windows), I get all layers, but the other way round it works with no setting neither preserve edit, nor  details. 
intrestingly,importing a pixelmator PSD with layers can be exported from affinity as PSD and when reimported to Pixelmator the layers are available
The file itself is always quite simple, layer 1 = background, layer 2 = logo. 
 

Anyone got an idea?
Thx for your help!

Export_Pixelmator.psd

Export_Affinity.psd

Export_aphoto_edit.psd

[nucleardirk 3]

Looks like there is an issue with pixelmators import for CMYK files. With RGB i can edit layers, files in CMYK are having the issues.