u/Mamba4010

Need some advice:
(First Bike) 2019 with 11k on the clock, purchased and serviced in march with a good service history

Chain always seemed in great condition and regularly cleaned and lubed.

Went for my usual ride and when I upshifted from 4th - 5th I felt a clunk and complete loss of power. Once pulled over I noticed the chain has snapped and donated to the local vegetation.

The sprockets both look ok, is there anything else I should check out?

I will replace both sprockets and chain

Any idea on what caused this to happen?