Reproduction steps:
1. Open the attached “ASDQWE” project
2. Select “Assets > BigSubgraphRepro > GradientMappingParticleFragmentCore.shadersubgraph” ShaderGraph
3. In the Inspector Window, select the “Open Shader Editor” button
4. Delete one of the connection nodes

Expected: The Editor does not freeze
Actual: The Editor freezes for a couple of seconds

Reproducible with: 2021.3.28f1, 2022.3.5f1, 2023.1.4f1, 2023.2.0a23

Reproducible on: Intel macOS 13.4

Note: The longer freeze could be observed when undoing the deletion (command + z)