Large blueprint memory leak in project

Attached project exposes memory leak in editor. Cause is not known but increases memory very quickly when running PIE. The amount of memory used does not return to normal after closing PIE and each instance of PIE run will continue to increase the memory used.

Note: Attempted replacing Event Tick with timers, this did not slow the memory, however replacing the event tick in blueprint Fish (located in filepath game\fish\code) did halt the memory increase significantly.

1. Download and unzip attached project
2. Open Editor with project
3. Open Windows task manager, find the editor on list of processes, note memory used.
4. Press PIE, note change over time in editor process memory use.