Hello there,
I submitted this PR, to fix what I think is a bug: run `spring binstub --all` during `rails app:update` by beauraF · Pull Request #37804 · rails/rails · GitHub
Indeed, when you run rails app:update, spring binstub --all is not run when spring is defined. Which lead to spring no longer being integrated into your binaries.
If someone could take a look, give me feedback and let me know what the next steps are, that would be great.
Cheers, Florent.