Damage Isolated to certain Units in Combat

I’d like to report a glitch in the game that impacted my game play. Game # 5,525,917. I'll submit a ticket as well, but have had virtually no success getting issues resolved with tickets. I had split my artillery from their defenders because of an enemy advance. I was in the Meadow Lake providence on the 100 player map and I decided to move the arty to the road leading to the providence to the south, Kindersley, so I could get multiple artillery bombardments in on the advancing enemy before the enemy reached my defenders to get caught in melee in the providence center. I needed to have my melee defenders in the center of the providence because of another glitch where the defenders will start to attack when attacked unless they are in the providence center. The enemy was advancing from the N Battleford city and at one point the advancing enemy was able to get into melee with my artillery stack due to how narrowly the two road are even though they were on separate roads. Once that melee happened, I rushed my defenders up to join the arty stack to add to combat and spread the damage over all and defeat the enemy quicker. Once I had joined the two stacks, the combat continued for another tick or two and all damage was applied to my artillery and not to the other units despite them being in the same stack.

Here is a link to a screenshot of when combat was virtually over and I noticed the glitch.

https://ibb.co/vkhqFkG

This had a large impact on my game and my advance was virtually stalled on this front due to the reduced efficiency of my artillery.