When scrubbing the spinbox in a blueprint editor while the blueprint has working node connections (compiled) we are experiencing severe memory usage increase (leak?), it can go up by several GBs in a matter of seconds - depending on the size of the BP and how hard you scrub the spinbox. It also starts to lag during the scrubbing and it seems like its executing the graph while you do it. The memory gets properly freed up when you close the editor again.
We are using UE4.18.2 this is happening on different projects on different computers.
We also tested in 4.16.3 and it seems to have the same issue.