[BScout]

You should put the record tracks in blue mode to keep them aligned to the stems.

When tracks are in record, by default they already disable delay compensation. Blue mode keeps delay comp on to compensate for bussing delays.
Feeding stems to group record tracks with delay comp off or not in blue mode (which ends up being the same thing) means misalignment -- though it should be very small depending on your system if you are just bussing (with no plugins) from 3 stems to 1 master.
It also depends if this is HDX or not.

But then again, you used "bounce" and I don't know anyone in Post-Pro who bounces tracks. Everyone prints down into the session or a print recorder (or punches in.) You may be using "bounce" interchangeably but in Pro Tools' speak, that's a particular process.