Photoshop applies black stroke on every shape
I just started to use Photoshop 2021 a day ago and now I notice something really annoying.
I don't know if it a bug, or new settings that I don't find, but Photoshop started to apply a black border on every single shape created in my files once I open them even on files that I made months ago and I know for sure I never used black stroke on the shapes.
The shape itself is not visible on the image, mock-up, shape only if I once change the stroke to outside one.
I opened up at least 10 of my files in order to remove and save because at first, I thought I accidentally made the files like that as I was copying and altering shapes from file to file. But then I reopened one of them again after this "bug fixing" of mine and there it was again that black border.
And a colleague of mine downloaded one of these files and she is using an older version of Photoshop and her Photoshop doesn't show the black stroke.
Please help me to remove it, it is really annoying. These files are going to be the base of future mock-ups and I do not want them to be duplicated with the black hidden border inside. Even though it is not visible, it should not be there.