
I think the link action comes from here:
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<a href="javascript:void(0)" command="workbench.action.openSettings" args='"java."' class="list-group-item list-group-item-action flex-column align-items-start btn btn-link mb-2 p-2" title="Open Java Settings"> |
Filter argument goes into the Settings editor correctly, but VS Code (1.61.2) seems to ignore the dot.

I will open an upstream issue and link to it.