Go to file does not list files in directories called "build"

[MinnDevelopment]

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The "Go to file" or file search does not list any file if it is in a directory called "build".

For instance, OptionData in this repository is not listed when I type it into the "Go to file" input:

This has been broken for quite some time, I thought it might be related to build being in the .gitignore, but that does not seem to be related since this also happens in other repositories like raphew/jenesis. In this repository, all the source files are in sources/build, which is entirely unsearchable.

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