A week ago, after some windows updates to the SP2016 farm, we noticed some libraries that get their files from email, started receiving the same file twice.
I made a test library in another site collection on the same farm and sent it a file. and it also created the same file twice renaming the second.
I managed to find that it only happens on SP2016, not SP2013. therefore it is a bug. Any library you set to not overwrite the same name of mail in the file, will first save the file with the name you sent then add some random number to the name with the same file again.
Will MS fix this?
