This should be reported to the OXC team, as it happen also in OXC.
However, the code in both OXC and OXCE around the pathfinding and path preview is so complicated and full of exceptions and workarounds... that any attempt in fixing this will probably result in introducing 3 new bugs.
(I don't feel like touching that part of the code ever again in my life.)
Still, if someone feels like investigating, and finds out there is an easy fix for this... do let me know.