Ju87-losses due to "bomb-explosion"

[yogybär]

Some documents show unexplained explosions of Ju87 during flight, i.e.:

StG2:
"
(Hptm. Wutka, Bernhard -- geb. 12/3/1916 in Dittersbach,
gefallen durch Explosion seiner Ju 87 im Ansatz zum Sturz
beim Auslösen der Bomben - G.Brütting)
...
(Am 14/7/1943 explodierte Maschine von Oblt. Schmid
bei einem Angriff o. Winogradowka in ca. 600 m Höhe.
Mit ihm fiel sein BF Uffz. Walter Dicker - H.Nauroth)
"
StG77:
"
Ju 87D-3 W.Nr. 110318 4./St.G. 77
FF Amelin, Ofw. Bernhard
BF Schwarz, Uffz. Wilhelm
Both KIA, exploded in flight. Pl.Qu. 6121 100% F

Ju 87D-3 W.Nr. 1075 5./St.G. 77
FF Fitzner, Oblt. Karl
BF Meyer, Fw. Ernst
Both KIA when aircraft exploded in flight. Also brought down wingman Känig. Pl.Qu. 61152 100% F

Ju 87D-3 W.Nr. 1423 2./St.G. 77
FF Hoffmann, Uffz. Hans
BF Janke, Uffz. Herbert
Both killed, exploded in flight. Pl.Qu. 61212 100% F
"

I read something about romanian Ju87's exploding during bomb-drop. Does anyone know more on this and its reason?