When opening a page: https://i.imgur.com/miWFM2s.png
--> the proofread tools bar doesn't appear
After refreshing (CTRL+MAJ+R) that same page 36 times: https://i.imgur.com/ne4RH7q.png
--> the proofread tools bar finally appears.
There's probably a conflict with scripts/gadgets globally enabled on fr.wikisource because I don't have this problem on en.wikisource or wikisource.org.
It's very annoying when working on proofreading pages, this really need to be fixed, that's why i'm opening this task.