PSD files do not 'see' fill layers

[GrahamMYC]

If  you export an affinity photo file as a .psd file, then any fill layers are ignored. The workaround is to rasterise the fill layers. But this depends on remembering that a specific file contains fill layers. This effectively prevents batch operations for exporting to .psd as this wold be unsafe. 

Are there any plans to notify you that fill layers will be ignored? Or could a question such as "Convert fill layers to pixel layers?" be included if an attempt to export to ,psd occurs

And

Are there any other features of Affinity that do not save in .psd files?