Resolved issues are no longer fixed versions my bug has been fixed but it was resolved and they fixed it at the end but it still not in fixed version(s) in 1.15-prerelease1
if you want more information watch the video and slicedimes video https://www.youtube.com/watch?reload=9&v=yLU6O1OtTyg at 2:35
then check MC-165681
to make it sure
Your issue was resolved as invalid due to it not being a bug. You can apply dye to signs, changing the apperance of the text.