Regurgitation
Was observing this bird from very close distance and still this bird was ok with us around which
was very unusual... And then after a very long wait he puked it out..
Probably it was 'unpalatable/unable to engulf i.e. large to digest' bee was making it uncomfortable to fly or do other activities.. But after puking it out.. He caught a butterfly of even a larger size.. And legend continued.... ;-)
Regurgitation is the expulsion of material from the pharynx, or
esophagus, usually characterized by the presence of undigested food or blood..

The Asian green bee-eater is a near passerine bird in the bee-eater family. It is resident but prone to seasonal movements and is found widely distributed across Asia from coastal southern Iran east through the Indian subcontinent to Vietnam. Populations in Africa and the Arabian Peninsula that were formerly assigned to this species are now considered distinct species.
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