Will bastion go back to recon mode if charged by D.va?
Bastion can't be moved while in Sentry configuration by knockback effects such as D.Va's Boost or Pharah's Concussive Blast. He can only be knocked back if he is first stunned out of Sentry configuration with abilities such as Roadhog's Hook, Reinhardt's Charge, Ana's Sleep Dart, McCree's Flashbang or Sombra's Hack. Bastion can be moved by Zarya's Graviton Surge or Orisa's Halt! abilities, but will remain in Sentry Configuration while being moved.
D.Va's thrusters can't stun, only displace, so they won't work on a Sentry Bastion.