What happens with scripts during deployment?

Question

Ruby on Rails

A question.
On a local machine, in development, everything works fine and smoothly in terms of assets.
When deploying an application to production, some unknown metamorphosis occurs with scripts. Errors with unknown classes appear in the webmaster console of the browser, jquery version 3.0 does not fit bootstrap 3 series (although everything is ok on the local machine), the jasny-bootstrap extension over the regular bootstrap does not work, etc.
How is my script on the local machine different from production, well, except that it is compressed? What manipulations with .js when rolling out to the server can result in all sorts of glitches above?
Assets recompiled. I checked all the linked libraries, everything is there. I put everything through bower.