Chopping graphics in 20w22a

In this snapshot, the graphics are a little chopped, like a low framerate but without framerate dropping. in the last snapshot (20w21a) the graphics are more smooth.

 

My hardware is a bit outdated:

• AMD Phenom II x4 940
• 8GB DDR2
• GeForce GT610 1GB

 

Thank You for the time.

P.S.:English is not my native language. Forgive me for the errors.