Found a bug, listed on Steam and re-listing here, I haven't read the entire thread so sorry if this has already been reported:

vision cones/circles stuck on

2 party members, both in stealth. 1 was seen by a void-tainted turtle (wrong name i'm sure) on the beach. 2nd member never entered combat. I took control of the member in combat, ran around behind a rock and entered stealth. After a few ended turns to ensure they weren't chasing me, I hit leave combat to be teleported back to the shrine next to the crashed ship, and have the stealth vision cones visible for both friendly and enemy units, whether or not I am in stealth.

These cones still display correctly (i.e. when I enter stealth it turns to a cone, outside stealth it's a circle), but it displays on the mother and child atop the hill, as well as the child by the shrine next to the ship.

This covers my actions in full (to ensure the bug is reproducible), I assume it is something as simple as fleeing combat whilst in stealth. This information is simply to cover all the basis.