Hello!!
Typically, I just write straight through all my chapters because if I tried writing in a different order, I'm afraid I'll get all mixed up and the flow of the story will get all jumbled up. If I ever get stuck on a part, whether it's because I can't think of the right wording or I just have no idea what to say about it, I'll usually just type the first thing that comes to my head just so I have something on paper, and I'll leave a little note on that section saying to come back to it later.
I hope I understood your question correctly and answered it well!! Thank you so much for asking! (´｡• ᵕ •｡`) ♡