Show and hide propagated a whole subtree first, then fired from a snapshot, parent first: a parent's `OnShow` ran before its children's, and a child hidden by an earlier handler still got its `OnShow`. A frame visible at the end of its load got no `OnShow` at all.
In 1.12.1 show `0x76ae10` and hide `0x76ad50` mark the frame, walk the live child list re-checking each child's gate, and fire the frame's own handler last (`0x76aef5`, `0x76adfd`). The post-load hook fires `OnShow` after `OnLoad` for a visible frame (`0x76a3b3`), from XML and `CreateFrame` alike.
Now handlers run inside a live post-order walk, and the post-load `OnShow` fires. Tests cover the order, a sibling hidden mid-walk, and one or two `OnShow`s after a load; they fail without the fix. Four existing tests' expected orders flip to the reference's.
Fixes#350Fixes#59🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
