I’m not sure how that could happen.
The SD1 had quite a robust (for the time) safe-to-arm delay mechanism involving the wings (hence ‘butterfly’ bomb) acting as an arming vane. If the bomblet didn’t fall the prescribed distance through the air it wouldn’t spin enough and couldn’t arm.
And like other cluster munitions it was carried in a ‘mother bomb’. If anything was going to get hung up in the bomb bay it would be the mother bomb.
I know it's Wikipedia, but the source is Alfred Price: "The SD 2 saw use in the opening stages of Operation Barbarossa, the German invasion of the Soviet Union, which began on 22 June 1941. Twenty to thirty aircrews had been picked to drop SD 2s and SD10s (10 kg submunitions) on key Soviet airfields, a flight of three aircraft being assigned to each field. The purpose of these early attacks was to cause disruption and confusion as well as to preclude dispersion of Soviet planes until the main attack was launched. It was reported that Kampfgeschwader 51 lost 15 aircraft due to accidents with the SD 2s - nearly half of the total Luftwaffe losses that day."
It may not be correct, but back in the 1980s I remember reading about how while the SD-2 "devil's eggs" were very effective against aircraft parked in the open, they were touchy beasts not loved by aircrew - if it's a myth it's a persistent one.