Skeleton3D Editor Slowdown

[JoltedJon]

Tested versions

• Reproducible in v26.1.rc.1.custom_build [970e901]
• Regression after cced5a4

System information

Redot v26.1.rc.1 (970e901) - Arch Linux #1 SMP PREEMPT_DYNAMIC Fri, 02 Jan 2026 17:52:55 +0000 on Wayland - X11 display driver, Multi-window, 1 monitor - OpenGL 3 (Compatibility) - AMD Radeon RX 9070 XT (radeonsi, gfx1201, LLVM 21.1.6, DRM 3.64, 6.18.3-arch1-1) - AMD Ryzen 7 9800X3D 8-Core Processor (16 threads) - 30.50 GiB memory

Issue description

When clicking from Skeleton3D to the MeshInstance3D type on the inspect (See Image) the MeshInstance3D editor has a noticeable delay (~0.7 seconds)

Bug:

screenrecording-2026-01-27_21-17-04.mp4

Expected:

screenrecording-2026-01-27_21-32-32.mp4

Steps to reproduce

1. Select dummy_fighter.tscn
2. Click on Skeleton3D in Inspector
3. Click on MrEggJoined in Inspector (and notice delay)

Minimal reproduction project (MRP)

slow.tar.gz