The size of bomb required to break the dams was only just capable of being carried to them by a Lancaster.
The Mosquito and Invader trials are of the smaller version known as Highball, meant as an anti-ship weapon. It never reached operational status.
Sir Barnes Wallis - Bombs
The Invader was trialling Highball for use by the American air force. The fatal release is insanely low. I don't know if it has ever been established why the pilot was so low, as British practice (which he must surely have known about) was to release much higher, after the early incidents with Upkeep damaging Lancaster's tails.
The Highball incident