KungPao, that is a known LOS bug based on how RS looks at LOS in certain situations. William has done work to fix it in the new Cold War game engine for Southern Storm. If I recall correctly, the LOS in new case is going thru the high ground in the middle, but in the other direction it is using the low ground and can see. Unfortunate set of circumstances for the red side in that one case.
OTS is looking forward to Southern Storm getting released!
Cap'n Darwin aka Jim Snyder
On Target Simulations LTD
KungPao, we indeed are addressing this for Southern Storm.
In Red Storm, the line-of-sight between those two hexes runs along the seam of the hexes in-between, and it is ambiguous how to interpret the line-of-sight, and from which intermediate hexes to take into account visibility/concealment and elevation. Most of the times the results are fine, but there can be corner cases for which the results are surprising (like the above situation).
In Southern Storm, we test using two lines-of-sight, offset left and right of the center line/seam, so we are robust and predictable in these situations.
Sadly, since the above solution requires twice the compute power, and is part of a bigger rewrite of the line-of-sight code, it is not something that we can back-port to Red Storm.
Honestly, there is just no real free time for us to work RS code with everyone working on Southern Storm right now. We do plan on revisiting RS/GR content in the future to bring it up to the new Cold Wars engine standards,but that will be some time after Southern Storm's release.
OTS is looking forward to Southern Storm getting released!
Cap'n Darwin aka Jim Snyder
On Target Simulations LTD