Debugging Dash on localhost

Most bugs / errors are either caught in the console or browser console. However, there have been a few times when nothing appears in either of the two.

In such instances, what is your line of debugging? How do you attempt to traceback the issue? Are there any other tools that could help with debugging dash app issues locally?

Could you please elaborate a bit more on any of the examples when that type of errors do not print traces?

In my case, most of these scenarios occured when there was no error at all, but the functioning was different from the expected one (which is actually not an error itself, but a wrong solution of the problem).