I put many hours of investigation into this Problem and found a lot of Solutions, i mentioned in this Thread:
The easiest way atm to fix this issue is Claiming Plots parallel to Streetesque Plots with another Char, that bambozzles the Algorythm and eveyrthing shooould connect again, just Plots varrying in height are really Painfull to get together.
But if you’d ask me, wait for the fix, i wasted so many Plots on this issue and it can get so incredible annoying finding the breaks… Its not worth xD.