Rider has its own ignore file, so does Visual Studio. The ignore statements for Rider (idea) IDE should be removed from Visual Studio .gitignore file template.
@@ -293,10 +293,6 @@ paket-files/
# FAKE - F# Make
.fake/
-# JetBrains Rider
-.idea/
-*.sln.iml
-
# CodeRush personal settings
.cr/personal