KaTeX parser does not work properly

[dnlsilva]

Description
If you send only KaTeX it works correctly, but if you send inline it doesn't.
Only KaTeX:

Inline KaTeX:

Expect it to render like this:

To validate the way the render should be done use this site:
https://www.mathjax.org/#demo

Steps to reproduce
Send this message to a user:

This text includes math notations and should be wrapped correctly for $\\alpha$ and $\\beta$ within the view.
The following formula shouldn't be inline:$$x_{1,2} = {-b \\pm \\sqrt{b^2-4ac} \\over 2a}$$
However the following formula should be inline with the text: \\( a^2 + b^2 = c^2 \\)

Insert an image/gif