In T176033#3772735, @Reedy wrote:

In T176033#3772520, @dasime wrote:

In the interest of avoiding anybody else making this mistake another non-development solution might be to better promote the Special:Preferences#mw-prefsection-watchlist section from the Special:Watchlist page. There are already links for Special:EditWatchlist, Special:EditWatchlist/raw and Special:EditWatchlist/clear on this page so an "Edit watchlist settings" link wouldn't be too amiss.

Seems reasonable to me... Would be worth filing as a separate task, and referencing this one though :)

In T176033#3772917, @Reedy wrote:

You did hit "show" after changing the value on Special:Watchlist? Just checking... As it does sound like there's some bug here...

In T176033#3772735, @Reedy wrote:

In T176033#3772520, @dasime wrote:

Additionally, it appears the "Days to show in watchlist" configuration set in Special:Preferences takes precedent over the "Period of time to display" configuration set on Special:Watchlist which doesn't seem all that intuitive.

What do you mean takes precedent? Does changing "Period of time to display" not work if the preference is set to 0?

I can confirm that setting the "Days to show in watchlist" to > 0 does make revisions display in the watchlist!

Just wanted to bump this ticket as I'm still having the same issue. I would appreciate it if I could get some feedback on resolving this.

Approximately how many entries does your watchlist have? ("Raw watchlist" might display that).