Possibilities include a common cause associated with both engines (either at the engine level or the aircraft system level) and that one engine may have belatedly responded.
Whilst #1 has suffered more LP damage, and thus seemingly at higher power, it also suffered a lot more damage full stop i.e. the fan case, which will disrupt the fan, maybe was disturbed a lot more/earlier. #2 seems fairly intact, and just has hoovered up a lot earth
#2's fan case, IMHO, may not have even been disturbed
