jaelis
Oh this is where the title goes?
Sounds like JC has reversed his ruling on the timing of bonus actions:
Of course, everyone should ignore that and play as you like. But I guess it's good to know the official position.
https://twitter.com/JeremyECrawford/status/994993596989300736Clarification about bonus actions: if a feature says you can do X as a bonus action if you do Y, you must do Y before you can do X. For Shield Master, that means the bonus action must come after the Attack action. You decide when it happens afterward that turn.
Of course, everyone should ignore that and play as you like. But I guess it's good to know the official position.