Charinsert gadget¹ does not load for some users at English Wikisource. It's unknown how many users it affects. The date of first failure does not correspond to the last MediaWiki update. Please see this discussion.
https://en.wikisource.org/wiki/Wikisource:Scriptorium/Help#Charinsert_bar_disappeared
See also:
- T86715: Regression: No longer able to insert characters using CharInsert gadget based on extension after 1.25wmf14 roll-out.
- https://www.mediawiki.org/wiki/Thread:Extension_talk:CharInsert/Character_insertion_stopped_working_after_1.25wmf14_rollout
¹ Source code:
https://en.wikisource.org/wiki/MediaWiki:Gadget-charinsert.js
https://en.wikisource.org/wiki/MediaWiki:Gadget-charinsert-core.js
https://en.wikisource.org/wiki/MediaWiki:Gadget-charinsert-core.css