We have one bug report after rolling out T265716: Allow users to set their default watchlist item expiry time

In T265716#10915009, @FlatLanguage wrote:

In T265716#10914984, @FlatLanguage wrote:

I’ve set the default duration for manual watchlisting to indefinite, and the default duration for edited page watchlisting to one month. When editing a page that was already watchlisted indefinitely, the duration was shortened to one month. The behavior I want is that longer duration is prioritized, not later action’s. (I’ve make the same post on mw:Help talk:Watchlist expiry)

It occurs by DiscussionTools or mobile edit.

I think the correct solution is probably to set the dropdown value to the current expiry when the page is already on your watchlist.