After sliding the slide several times, I find the rollback function of Twinkle (the rollback and rollback[AGF] link.) disappears. This situation occurs in Chinese Wikipedia (zh.wikipedia.org).
Topic on Extension talk:RevisionSlider
The slider conflicts with Twinkle？
It sounds like this is the same issue that both the Thanks extension and wikEdDiff ran into!
I have filed an issue on GitHub for the Twinkle code repository (see https://github.com/azatoth/twinkle/issues/360).
I imagine the Twinkle devs will take a look at it over the next days and patch Twinkle and roll out the change.