please go and support them.
These, where i talk about something i found weird and how i work around with it.
Solidify faces
'Solidify face' be 'error' on 'ultimaker cura' which sometime OK to print, sometime not.
'Extrude' not show error, but a lot of work after that. like delete faces, or 'merge vertex', because they create other faces and vertex which slightly different position. especially if you want to make a tunnel, use 'boolean Modifier' is more easier.
Merge Vertex
After 'merge vertex', face still there (sometime not even move with vertex) which make problem to print, so might delete 'face' too