Try to resist that upstroke! It may feel natural, it may not.
The real key to fluent playing is connecting your strokes.
The time it takes to go from a down stroke to an up is very minimal. Widely used by many.
But the time it takes to go from a down to a down is even more minimal.
Try it and get used to it.
It's life changing.
Cheers.
▶️ 3Speak