The period-selector arrow-key test called .focus() on the AM/PM radio right after clicking the field. show() moves focus into the dialog from Alpine's $nextTick, which Livewire's bundled Alpine defers with a real setTimeout(0), not a microtask, so the dialog was still closed when .focus() ran and it silently did nothing, leaving the arrow key with no effect (step 36 batch: browser tests for the datepicker/ timepicker rewrite). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9