The UdonSharp/UtilityScripts folder and it's contents are recreated upon Recompile or Asset Reload for some world projects. Data loss can occur if a creator modified or added content to the existing scripts. This also changes their GUIDs which creates unnecessary changes on worlds shared via git.

Related: https://feedback.vrchat.com/sdk-bug-reports/p/vrcdefaultworldscene-sometimes-is-recreated-upon-project-launch