Sometimes there is a problem with these tags. In the translation window, all formulas and code samples are displayed normally, but in the already published article disappear, there are only closing tags </ math> and </ sourse>
Topic on Talk:Content translation
Thanks for your feedback, @The Iron Addict.
We are working on version 2 of Content Translation which will use a more solid editing surface that is expected to solve many of these issues. Since it is a big architectural change still in development, it will take some time until it becomes the default version, but you are welcome to give it a try and check if the specific issues you are observing are solved with the new version. You can find more details about the plans for version 2 in the link above.