For the following fillet, the cut is going through the bottom. However I want it to stop at the split line, showing in the following photo.
Are you trying to avoid this weird corner and get a more "flat" corner???
Try changing your order of operations.
OR remove the bottom section, fillet the top edges, then covert entities of the bottom face to add it back.
I don't know if this will be a real-life result or the radius you truly desire.
I tried other ways and got weird results.
Uncheck tangent propogation
It's not about propagation, unchecking it makes no different.
The only thing I can figure is to do the top loft and fillet, then do the bottom extrude.
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