anordr That's an issue with FDM
I have it too on all browsers with FDM enabled.
It's not parsing +%22 correctly
attachment%3B+filename%3D%22SLR_SinsVR_Simply+%22Bellissima%22_3584p_25392_LR_180.mp4%22
First and last %22
encompass the filename construction. (green)
%22SLR_SinsVR_Simply+%22Bellissima%22_3584p_25392_LR_180.mp4%22
SLR_SinsVR_Simply
+
"Bellissima"_3584p_25392_LR_180.mp4
It uses the same code to build the filenames for the other resolution download buttons too.
FDM sees it as %22SLR_SinsVR_Simply+%22 and discards everything else
You'll have this with every filename that has " in it.