After trying to understand shield mitigation I found a bug.

I was tracking the damage that a lum and assailant damage do to each other per each weapons fire in order to build a model for shield mitigation

Lum does 53.5 damage per 6.5 secs.  First attack of the lum drops assailant shield to 315 (360 - 53.5 * .(1-.15)) which is what is expected. However before the lum fires again I noticed that the shield for assailant goes down to 288 for no apparent reason. Then when the lums fire again (6.5 secs later) the assailant shield drops to the expected amount to 247. I thought it was a fluke but after the third time the lum fires dropping assailant shield to 206 (expected amount again), the shield for assailant drops to 192. Again for no apparent reason. 

At first I was thinking it was due to the side beams firing without showing the graphics, but when I tested it so the side beams will fire at structures on both sides, the same thing happens again.

I then tried a different unit against the lum, but it still happens. (tried against flak and lrms)

Can someone try to test this themselves and confirm this. 

Only happens with lums.

To Sum things up

Each shot is 6.5 secs intervals (shield goes up a few between shots. Mitigation goes up and down as well)

# of shots           Assailant shield

0                       360

1                       314

(2 secs later)      288

2                       247

3                       206

(2 secs later)      192