Shahab_VR

i Have 92 accord with an h22 swaped from CD6 accord dont know the exact model year but the the engine serial number is 2021442 i took my engine out to get it fully rebuilt after i take the car back from the shop i noticed an strange oil leak from the back of the engine just between the gap of the head and the block but the weird thing is it leaks only when the engine is off not a single drop of oil leaks out when the engine is running does anybody have an idea what could possibly be be wrong with my engine???