Lee lost to Ruben Navarro?

Well, i know it´s very unlike, but a Boxing fan in a MMA forum stated:

"Featherweight boxer Ruben Navarro KO’d Martial Arts legend Bruce Lee in .55 seconds back in 1969 on a Hong Kong movie set, causing the “Little Dragon” to postpone film shooting for three weeks.
That fight, which is on film and was posted on YouTube, was completely one sided despite Lee outweighing the Boxer by 15 pounds."

What do you say? Is this the opinion of a hardcore Boxing fan or is it true?

What i know: Lee wasn´t in Hongkong durin 1969, especially not on a film set.