Formatted text paste is abysmal and fundamentally broken. How can I disable it?

Summary
When you copy text for example from a website and try to paste it into your mattermost chat line, it tries to format it. Its not only utterly useless, goes against the default behavior of 99% of applications in the world, but also broken most of the time.

Can it be disabled?

Steps to reproduce
Copy and paste from a website into mattermost chat.

Hi tyronx,

it cannot be disabled, but you can use the unformatted paste keyboard shortcut which is standard nowadays in most of the applications, that is CTRL/Cmd-SHIFT-v instead of just CTRL/Cmd-v.

Alright, thanks for the tip