IDK who needs to hear this but (I certainly did) : A chapter is not required to be 2000-4000 words in length (or whatever 'reasonable' amount it is in your head.) A chapter ends where you feel comfortable ending it. You make your own rules!
A chapter ends when stopping there and forcing readers to wait for the next update is going to cause screaming. Word count has nothing to do with it
The chapter ends When It Releases me, and not a second before.
The chapter ends when the characters say so.