indents disappearing from output after previewing post

[sparkz_alot]

I have to say, I've never used "Quick Edit", only "Full Edit" or "Mod".  I also try to always "preview" my posts before actually committing it and I have never had occasion to notice indents being removed or the length of indent being reduced to a number lower than 4 (though I may have not noticed a 'one space' difference). I also never use the editor buttons, but rather manually type in the respective bracketed command (python, output, error, inline and quote) with a blank line between the opening and closing brackets. I always use the key sequence "Ctrl + Shift + V" to paste, regardless of how or where I copy from.

I'm not sure if it's the default, or a recommendation from the past, but under the User CP --> Edit Options, I also have the "Put the editor in source mode by default (disable WYSIWYG editor)" checked.

I would think that if this were a problem with MyBB or the coding module, the problem would manifest itself for all users not just a random few.

Then again, perhaps I have Super Posting Powers