I don't have the ability to capture video, but I just placed a Calachlaena Shrub at the center of the Van Chu temple and the glitch happened. Also, it seems to affect not only the placed object but also LIKE objects. I just moved around also panning camera.

I've noticed it mostly on backpacks and helmets. I'm sorry I don't have a complete list at this time.

I don't have the classnames handy, but it was any of the smaller bushes/ banana vegetation matching those around the Van Chu Temple. Specifically the area that is open/fallen trunks in the south west area. I was trying to thicken the vegetation a little to block spawning locations that might be noticeable to the player in certain instances. When testing I noticed when panning, every placed plant/tree object seemed to stretch or twitch slightly. I've noticed the same bug with the GM DLC too. I hope this helps.

It happens when multiple separate groups of the same US ARMY faction are in 'combat' behaviour in the same vicinity. I can't tell if the ambient call-outs originate are from units in the same group, or separate. I haven't noticed any one line of dialogue being cut off either. I don't know if it happens with other languages. Thank you!