I frequently use Synchronize Folder and noticed it tries to remove my PNG file if there's a JPG file that has the same file name. There's no issues with importing them, editing them, etc...
The only workaround is to uncheck the "Remove missing photos from catalog" on the Synchronize Folder window prompt so it doesn't remove it from the catalog.
I have the latest version of Lightroom for Windows (v5.6) but it's been happening in previous versions as well on both Mac and PC.
Has anybody noticed this?
Do you have "Treat RAW + JPG as Separate Files" enabled or not in preferences?
Hey thanks for the suggestion, that fixed the problem.
Not sure why Lightroom treats PNG files as raw files...