Flowsheet connections are broken on second viewing

[dangunter]

If you try doing the same m.fs.visualize() call in e.g. the HDA flowsheet with distillation, both before and after the .solve() step, the second visualization has very different looking links -- orthogonality is wrong, etc. Something perhaps with saving, or just with the step where changes are merged.

[elbashandy]

Not able to reproduce it