Sometimes when I plan underground power cables, especially when they are longer, small dents appear. Often I can get them out by deleting a part of the cable far enough from the dent. Sometimes though even that doesn't work and the dent removal process lets the dent wander towards a point where the dent isn't removable anymore because it will just reappear at the place where I removed some cable and then will only wander towards the old point. Sometimes the point persists even after removing and replanning the whole cable.
This bug was there long before the maintenance update.
Are there strategies to avoid this from occuring? I don't want to give up underground cables, because city planning is so dependent on infrastructure and space.
Ah, those little boxes. They appear where two sections of a long underground cable meet. I wouldn't call it a bug, it's very realistic for underground cables to have access points for maintenance etc.