Why? During flight there are loadings much harder than influence of airflow disturbances from the dumped tanks, or even from physical contact with them. I think this radar is in safety:
If they are not empty, they'll simply fall downwards.
Sukhoi obviously knows what they are doing :)
Again, these are empty drop tanks, not bombs. Anyway, I really doubt these tanks have concerned the plane. Even if so, it means it's not dangerous. :)
PS Sorry for my english. :hang2: