Assume the following folder structure

Folder1/JobA
Folder1/JobB
Folder2/JobC

The global role for the user only has the Overall/Read permission and the configured project roles have all possible permissions.

When configuring a new project role for folder1 I want the pattern to be

^Folder1/.*

so only JobA and JobB can be accessed.

But when logging in with a user account that has only this permission only the empty "Welcome to Jenkins" page is displayed.

If I instead use the pattern

^Folder1.*

the user can access Folder1 and all items within as expected.

This seems to always happen when a forward slash / is used in the pattern and using the second pattern is not an option in my use case as someone could create eg. Folder 10 which would then also be matched.

Also the preview of matching Projects correctly displays all contents of Folder1 in both cases, although the first pattern doesn't actually grant access.

I have also tried to escape the forward slash with a backslash ( ^Folder1\/.* ) but that didn't help either.