i find that vision in this game is often if not always a little bit broken - units which are inside vision range often dont show when they are one the edge, or show with a delay.
for example in that replay jagged sent i found at least 10 cases when vision was misbehaving to some extent - such as units getting within vision range of manits but not showing up until they started shooting, units disappearing in vision range, radar blips not being discovered until well within vision range, ect
also the delay between vision disappearing and the units disappearing, but this might be a "feature" by now, so not really complaining about that in particular, but i think its tied to this behavior
im not sure if this can be cleaned up or not to be more responsive and crisp, but it would certainly be nice.
for another example just look at this speed video with the enemy acu in the transport -
https://youtu.be/Z05hNoPpE_A?t=325the transport appears well within vision range of the acu