Have you noticed how the gulp-typescript compiled code works oddly?

Question

JavaScript

This is not the first time I find myself thinking that the compiled code does not work as it should.
For example, in module "a" I changed something and once an error appeared in module "b". I start to disassemble and an error is shown in the console, which is not there, for example, some local property has the wrong value. And when you start checking this property, that is, you output it to the console, bang, it all worked. And it was both before and now, and the more code, the more often such incidents.
I also sin on gulp-never, which I will turn off now, but still I want to ask if this happens to you and if so, do you use gulp-never?