From the link above:
But Hayward is also expected to leave the bubble again in the coming weeks to be with his family for the birth of his fourth child and first son, who is due in mid-September Hayward will once again be subject to a four-day quarantine when he returns from that
Oh well. Maybe after we finish off the Raptors, we will rattle off 4 straight against the Heat with Hayward in mid-season form. Then he can take his time at home with his family and be ready to go for the Finals. One can only hope 
Personally, I wonder if what is quoted is still accurate. It's not much of an article to begin with, <300 words based off a tweet which is based off an instagram post, with apparently no new quotes or sources, there's not even an author listed (unless I'm just missing it). I wouldn't be surprised if that part about Hayward leaving for the birth is pre-injury, and the author just assumed it was still accurate (which it very well might be). Not trying to question the journalistic integrity here, but these mistakes do happen, especially with low effort pieces such as this. Plus all other sources on Hayward's return (
boston.com,
WEEI,
NBC Sports,
NESN), either don't mention him leaving again, or specify that leaving for the birth was the plan from July. I would like to hear from a trusted source that this has been re-confirmed though before I write it off completely.
I'm with a lot of you, returning to the bubble seems like an odd move if he's just going to leave again soon, though I can think of a couple of scenarios that would make it less odd:
* Hayward was okay missing 2-3 games for the birth, but not 10-12, so the injury changed his (or his family's) mind.
* They're trying to game the bubble system. Maybe once you've left the bubble for X number of days, you then have to re-quarantine for the full 7 days, so Hayward is coming back now before that deadline to reset the clock. That way when he leaves again for the birth, he'll only have to re-quarantine for 4 days, instead of the full 7 had he stayed out the whole time, which would allow Hayward to be available 3 days earlier.