Hello @finaltrigr thank you for your reply.
We can certainly document this bug with our Division team, but our Division QA team will often ask for a video of said bug to show it happening in the latest version of the game to aid their investigation. This is the same procedure for all our bug reports for all our titles.
Having looked further into this issue, it appears that the Bluescreen LMG's disruptor talent was reported to us previously, but has been marked as fixed in the latest changelog here >>https://discussions.ubisoft.com/topic/154922/tu15-known-issues-changelog?lang=en-GB
The area of effect will also only stack up to 50 I have been informed, which is why you will not see this stack at 50 or above