So on my alt account, that I use to play alongside my son, I'm in a very (very) small guild. I happened to hit level 65 last night, unlocking TB on that account. On a lark, I popped on and completed the phase 1 Phoenix Squad mission, but didn't actually finish the entire phase. Honestly, I was kind of surprised - I think I got 30-40% of the way to one star, so, you know, cool cool cool.
Anyway, after the TB was over, I had a laugh as I got 7 TB coins sent to my mail box for the PS mission. WHOO! But it got me thinking ... so I only had 1 day this time around to complete TB, but next time I'll have the full 6 days. What happens to the TB progress at the start of the next phase if you haven't completed it? Do your points get reset back to 0 and you get to try again? Do special missions reset as well? Or does it 'remember' where you're at (in terms of total points) and you get your squad refreshed so you can build on top of that?
I'm guessing you just reset completely to 0, but ... you know ... inquiring minds want to know.