IDE auto complete selection combo slow/hangs

Is it a known issue that the auto complete drop down causes the IDE to hang if the list is long when you select something?

Sample video here of what I mean, if you scroll quickly it seems to be okay but if you scroll slowly and then select something the IDE hangs from anywhere between 2s-3s to 30s.

I assuming it’s not an issue with the MBS plugin?

Also that dropdown really shouldn’t be longer than the IDE it’s self.