I had the same issue, but there is a simple work around.
Go to "settings" ->Crossfades-> and create at least 2 different crossfades: 1 for wet and 1 for dry.
For example: Use "general" for wet "settings" and "advert" for dry recordings.
Forget the whole: General, advert, etc.
Now go to Media -> File manager and create 4 different folders: 1 -for General (all wet)
2 - one for dry (for example dry recordings) 3 - etc 4 - etc
From now on, you make sub folders based on the crossfade.
We use a subfolder with wet Spots, which has another subfolder with other requirements under "general" folder.
Use a different subfolder under Spots folder with for example the sub folder title --> Adverts - Dry Spots.
When you now create your playlists or scheduled content, you can choose if you want a spot from the "dry" tree folder or "wet" tree folder...
Key in workarounds with RadioBoss Cloud is using the Scheduled options and Playlists.
It's all very simple, just think out of the box.
Sorry for the complex description and explanation but it really works. We are running 3terrestial stations completely on RadioBoss Cloud. Almost without issues..