Time stretch tool question

I was using this on audio drum tracks, just tweaking downbeats maybe a value of a 16th or less, and then stretching the remainder to fit the bar. I notice that then the tone or pitch of the measure is different. Is this normal, or can be set to not so affect?

To clarify, I am doing on the folder that contains the different drums on the track.

What algorithm is shown in the info line?

Nort sure what you mean. I choose the 3rd choice of the arrow, sizing applies time stretch

Tape styles affect pitch…it doesn’t actually specify if this is the same algo used for sizing applies timestretch but I’m guessing it is.