I don't know if it happened but if the leak were detected before it became public that would be the thing to do--when you identify a leak and can silo it you give the enemy a trusted source of disinformation. Spies are often not arrested for this very reason. Even once the enemy figures out what happened they're faced with not knowing when the switch happened.
One reason why the southeast of London was particularly badly hit by the German V1 "Doodlebug" flying bomb, was that British intelligence had captured and either executed or turned every German spy in Britain by that stage of the war.
The spies were given the choice of being shot, or continuing to send "information" back to Germany, that was supplied by British Military Intelligence.
When the V1 campaign began, the bombs tended to fall a little short of their intended target in central London. British intelligence officials directed their newly recruited double agents to tell their German controllers that the bombs were landing in the Northwestern suburbs, so that they shortened the range to correct this "overshoot".
The Germans believed this misinformation, and as a result the V1 campaign was largely wasted on the working class housing of the southeastern suburbs, and had little impact on central London.
This wasn't hugely popular with the people, such as my grandparents and my father, who lived in the southeastern suburbs.