The issue is already fixed in UE5 by CL 14368553. This Jira is created for cherrypick into UE4

Steps to Reproduce

1、edit BasePassPixelShader.usf

2、‘CTRL + SHIFT + .’, the mesh shaders in the map won't update

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There's no existing public thread on this issue, so head over to AnswerHub just mention UE-115127 in the post.

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Affects Versions4.26
Target Fix4.27
Fix Commit16236998
Main Commit16237617
Release Commit16236998
CreatedMay 7, 2021
ResolvedMay 7, 2021
UpdatedMay 18, 2021