Youtube extensions are maintenance-heavy, yet dozens of volunteers contribute a lot.
We are fixing many things, and nothing increases uninstalls much currently. We don't have the capacity to solve every riddle that might be hard to find (nor disprove every supposed, but not measured lag). Some bugs after changes to YouTube first might have to be noticed by as many as 0.7% of users or 5000 users or 10 angry reviews, before a user actually takes a look in the console (F12 Key) to tell us what errors might or might not appear. Generally, if you care, the assumed remedy is not accusing any of the volunteers, but volunteering and or donating "Producing, next to consuming". Thanks