Click on Skeleton Node with large number of bones crashes editor

[smix8]

Godot version:
v3.2.rc4.official

OS/device including version:
Windows 10 x64

Issue description:
Click on a Skeleton Node with large number of bones ( 186+ for a complex 3d character ) leads to console spam with "Object was deleted while awaiting a callback" followed by lockup/editor crash.

Bug happens consistently for all Skeletons in the project that use a high number of bones.
Tested and does not happen on previous versions v3.2 rc1, rc2 and rc3 for the same project.

Steps to reproduce:
Load scene with skeleton node from a 3d character with 100+ bones and play clickerheroes

Minimal reproduction project:
Assets are to big in filesize to share rightnow but if required for testing I could try to extract them from the project.

[Calinou]

Duplicate of #35652.