[1.1.107] Enemies abandon attack short of target

[martinekopl]

What did you do?
Normal gameplay

What happened?
Small group of bugs get repeatedly (multiple times in a 6 hour session) stuck near water tiles. F4 shows strange pathing things

What did you expect to happen instead? It might be obvious to you, but do it anyway!
Bugs should reach their destination (death) or go back to base

Always happens with smaller number of bugs, when there is big army they go a bit different route and do not get stuck
Bugs are stuck and wandering in circle until agro-d by a robot above them or player come too close

Might be case of Report 113935

No mods changing behavior

Attach video
https://www.youtube.com/watch?v=M6lw303fqBc

Attach save file (bugs stuck eta -10sec about screen length to the left and little up of player near water, coming from base near top left of said water