Static Strike of Lightning + Multistike/Greater Multistrike

Not sure if it's intended or not but it's near impossible to stack the lightning strikes on this gem while using Greater multi-strike or just multistrike.

My character is pretty min-maxed, and the most I can get is 8-9 stacks on a single target.

If I remove these supports, it stacks up almost immediately.

My character in hideout has over 6 attacks per second, so theoretically it should take 2 seconds to hit 12 for a single target. This should take even less time if I'm mapping because my ability can strike 3 targets, but I regularly sit at 6-7 stacks while mapping.

I think the idea is that you don't want it to insta-stack from the multi-strike mech, but in that case, it makes it so that you cannot stack them up to max on a single target or mapping, even in the best-case scenario (just sitting stationary going ham.)