Uploading multiple raw components hangs UI

I added 2 files to add at the same time via UI Upload in raw. I noticed the UI was hanging. After a time (more than 5 minutes) I refreshed and both files were uploaded. It seems for whatever reason the UI hangs despite a near instant upload. This doesn't happen for Maven or for a single file that I saw. I tried different files, so assume this is not file dependant.