The case of the intermittent missing red & green arrows ...

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Update: The above bug was consistent for quite a few battles (5 or so).  Then I restarted the game, bug has gone away & red & green arrows are working as normal.

Bug: *Very Rarely* are the red & green arrows (showing where a unit is going) missing ...

Probably not worth the developers time to look into this, unless bug appears more regularly ... so just leaving this bug report as a placeholder to see if this bug reappears ....