As always thanks for posting this. There is a bug logged for it now. Definitely unexpected results.
Fortunately you did find a way to make the shape as only one body, so there is not really a workaround needed, just avoid picking the profiles in a disjointed manner, which is the expected workflow. This almost qualifies as bad error handling, but there is technically no error, just unexpected results. If this has deeper impact, please let us know what that is. Does the result of 2 bodies instead of 1 block any workflows? That would add some weight to the bug report.
For our newer Fusion customers: there are actually several ways to revolve this shape without any problems.
1. Reduce picks: Do not turn off chaining, just pick the entire outer profile, including the axis, as your revolve shape.
2. For even fewer picks, revolve the sketch profiles (the yellow shaded areas inside the edges).
3. Or just pick the edges in order, from top to bottom, without skipping around.
In all of these workflows a single Patch body is created with 5 faces.
Thanks,
Phil Eichmiller
Software Engineer
Quality Assurance
Autodesk, Inc.