Hi,
in my small text scenario I read from a GDB. Inside are Point and Line features.
First I say 'Add Reader' and then I use 'Single Merged Feature Type'.
When I look at the Feature Type properties I see that only Polyline geometries are allowed (but I also have Point features that should get read to). I think this is what you observed.
In my case I did the following:
1. go to the Advanced Parameter in the navigator 'Feature Types to Read'
2. check all the feature types
3. use a FeatureTypeFilter to seperate the feature types
In my case I can split the feature types and they have the correct geometry.
I hope this works in your case as well,
best regards,
Stefan