The Horten wing plane Ho 2-29 had stealh capabilities

[Luno13]

The real-life version crashed after one engine burned out. Presumably the yaw of asymmetric thrust was too much for the air-brake control system.

If the Go-229 was stealth, it probably wasn't designed to be stealth...they just got lucky.

[Whacker]

To be fair, this was still relatively early on in the whole revolution of flight, and the accelerated development pace during wartime didn't lend itself well to thorough and safe testing. The compressibility issue comes to mind.