Actually when you're on third with fewer than 2 outs your MAXIMUM lead should be less than the defender at third base to avoid the unassisted double play on a line drive as well as being picked off.  Seemed like a good situation for a squeeze play.
The Jays made a lot of base running mistakes.
Bichette thinking it was Ball 4.   The Ump being late on that call didn't help.  But that's on  Bichette.  It's a potential walk.  There is no penalty for staying on first until you're sure.   Oh and kids, don't show up the ump by anticipating Ball 4.   They're not supposed to have egos but more often than not, they'll ring you up with a strike.   Again there is no advantage to not waiting.  And as you see, it can confuse your base runner.
Springer then made a similar mistake in Game 7.  He took off, then slowed thinking it was ball 4.....  Inexcusable.