Could be just viewtopic.php?t=128637 and/or viewtopic.php?t=127016

Almost missed it when searching, but yeah, there are two bots stuck over one of the Jellynut fields (bottom right) trying to place ground, I think they are trying to replace concrete with overgrowth soil and the instruction has gotten stuck, apparently they can't pick up the concrete to replace it.

In my Gleba base, occasionally I see construction or deconstruction orders being ignored permanently. A building scheduled for deconstruction will sit there indefinitely, including being ignored by my personal bots . I've also noticed that the Roboport network reports 19998/20000 Construction Bots ...