Bait and Switch fails to trigger on Specimen Claw attack

Opponent’s board had a Specimen Claw (2 attack; after your opponent plays a minion, attack it.)

My board had a Bait and Switch secret (when a friendly minion is attacked, give it +3/+3).

I played Leeroy Jenkins (2 health).

Opponent’s Specimen Claw attacked Leeroy, but the secret did not trigger, so Leeroy instantly died before he could do anything.

PC build 31.6.2.217489.216423

Unless the card says otherwise, your secrets cannot activate on your turn. It tells you this on the tooltip for the secret keyword.
https://i.imgur.com/TM3Fyat.jpeg

This isn’t a bug.

If you played Leeroy, then it was obviously your turn.

Your secrets don’t trigger on your turn. Secrets have always worked this way.

Why would you expect your secret to trigger on your turn?