On some Commons pages, there are two English captions. Additionally, if you scroll down a bit, there is ANOTHER set of captions. This is very similar to a previous bug seen on mobile (T216327)
Expected behavior:
There should be only one set of captions (right below the Open in Media Viewer button), and there should only be one caption for each language.
For examples, see:
https://commons.wikimedia.org/wiki/File:UW_selected_license_(not_own_work).png
Note: purging pages where this problem occurs and doing a refresh does appear to fix the issue.