Forum Discussion
Bug: Uppercase file extensions cause file to be renamed in Modern UI Details pane [Update]
Update 21-Feb-19: After being acknowledged by SharePoint Engineering, it seems this bug has been fixed now. I've tested on a couple of different tenants, including one on Standard Release. We hav...
Yup, I can confirm the behavior. Seems like yet another example of unproperly handled edge case, which is kind of the norm nowadays...