Ya! The official bug report form is here - I can say from experience you’re going to want to be very clear about things like your current version and exact steps to reproduce the issue, though.
Usually its best to try to replicate the issue on as tiny a project as possible, on a vanilla branch of Unreal. In general devs don’t have the bandwidth to deal with “sometimes in my large project this thing happens” type problems, but “if I pull a clean version of Unreal Blah.blah, put in this four function Blueprint in the level, X unexpected thing happens” is a different story. The narrower the repro is, the easier it is to fix the bug!