Editor Freezing opening Details in PIE (consistent sometimes)

Development Programming & Scripting C++
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1

I have my game’s Character that is kind of complex (built 90% in C++), it has 2 UActorComponents, an additional Collider, and it will have child Actors attached to it.

most of my work is done through VS Build+Run, and I do get similar situations with running it through the .Uproject

When I hit PIE it is running, but if I click on the Character in the level Hierarchy the Details window populates, and I get the PIP effect, but then the editor freezes. Looking at Task Manager the Editor can be up to 10-12 GB of RAM (normally this is sitting at like 2-3 GB for the Editor)

but If I open the Character Blueprint first before going into PIE, and click on the Character in the level Hierarchy, the editor continues “as expected”. then again if I have the tab open from previous session, but I don’t physically open the tab the editor freezes as though I did not open it.

Engine version 5.1.2 Epic Launcher Install.

is this expected behavior for complex Actors?

Steps leading to issue:
Open Editor (without opening Character Blueprint to Focus)
Click PIE
select Character in Hierarchy
Editor Freezes, and consumes too much RAM (10-12 GB of 32 GB total)

Steps that Avoid Issue:
Open Editor
Open Character Blueprint, or bring to focus
Click PIE
Selected Character in Hierarchy
Editor Continues at around 2-3 GB of RAM

2

Hi,
Have you been able to resolve or debug your issue at all ?

I am running into the same issue but with a BP Actor that consists of many Actors (roughly 50).
Steps to reproduce and the workaround are the same for me.

I debugged it a little bit further and at least in my case with less actors (5) I can select the actor with the editor only freezing for a sec.

3

I checked disabling the spawns for the attached child actors; so just has 2 UActorComponents and 1 extra box collider.
and th Editor still locks and goes into a memory allocation spiral, and I am using the pre-compiled Engine