This problem is already being discussed in the forum but I wanted to leave my grain of sand so that Blizzard technical support can investigate this problem as soon as possible.
Diablo 4 in many of its campaign cinematics suffers from stops and lag.
my PC meets the requirements to run the game and yet the game still has stuttering issues.
the best example of this is the in game Cinematic of Inarius and His Followers in Caldeum (When he stole the Soulstone)
I’ve seen even content creators with much better PCs than mine drop their fps by the time the camera turns to show Inarius.
This is an example but there are many more.
I apologize if at times my writing is not understood, English is not my language.
but I know that blizzard tends to see much more threads made by the English-speaking community
Hopefully this problem can be resolved as soon as possible by updates.
It is a shame to see how a game as beautiful as Diablo 4 is affected by undue problems that do not allow you to enjoy its campaign mode in the best way
My PC Specs
Intel(R) Core™ i5-7400 CPU @ 3.00GHz
Radeon RX 570 Series 4gb Vram
24 GB RAM
By the way, I have tried to follow what is said in this thread and nothing so far has solved the problem.