Buffer size?

Hi guys, hope you're all well.
While having a mix this evening, everything was going well until I started to mix in a tune that was an extended version about 10 minutes long.
It played fine, but felt like it was dragging on a bit.
Could this be due to the buffer size? And if is what buffer size is recommended?
As always, thanks a lot for your time

While having a mix this evening, everything was going well until I started to mix in a tune that was an extended version about 10 minutes long.
It played fine, but felt like it was dragging on a bit.
Could this be due to the buffer size? And if is what buffer size is recommended?
As always, thanks a lot for your time

