Assuming this is about Edit-Review-Improvements-Integrated-Filters

This was actually done on purpose. The patch by @Sn1per, merged for T2424: Add a direct unwatch link to entries on Special:Watchlist, explains in the code comments the reason behind this choice:

// Don't show unwatch link if the line is a grouped log entry using EnhancedChangesList,
// since EnhancedChangesList groups log entries by performer rather than by target article

Also, the author wrote this comment - T2424#3019594, which provides the similar insight.

@Petar.petkovic - yes, the following makes sense.

Don't show unwatch link if the line is a grouped log entry using EnhancedChangesList,
since EnhancedChangesList groups log entries by performer rather than by target article

However, in the scenario I described in the ticket, ungrouped entries (they are log entries) show unwatch links.

When the group option is enabled, which, btw, is called "Group results by page" (not as the comment above suggests: "EnhancedChangesList groups log entries by performer rather than by target article"), the grouped entries do no have the direct unwatch link:

So, to summarize - there should not be discrepancy in displaying unwatch links for the same entries with and without Grouped mode. If we will make such diffierence that that the comment you cited suggest (grouped by performer not by target article) , that fact should be somehow reflected in the name of the option.

Two things I don't understand:

• Why does it make sense to group log entries on Watchlist by actor instead of by page? The only log entries on a Watchlist are log entries that are about a PAGE that I'm watching. So I would think they should be grouped with the other changes that are about that page. What am I missing?
• Why are we working on this if the Watch/Unwatch links were added by Community Tech. @DannyH or @kaldari, can we just sign this over to you?

Would like to get @Sn1per's take on this before deciding whether or not it's worth changing.

I don't know why log entries were grouped by performer, but it required more logic to deal with when implementing unwatch links. To enforce consistency, I would prefer the log grouping behavior to be page-based rather than removing unwatch links from the ungrouped log entries.