Problems with viewing post source

[MarcinnT]

Hey, guys

I've encountered two issues with the forum software that arise when trying to view a post's source (the far left button on the Advanced Editor toolbar):

• When viewing a post's source, the edit box changes color scheme to light gray on white which is difficult to read:
  https://gyazo.com/904e53301066ed4942501b56f71372fa

• If you include any tagged @ mentions in the post and then click on source button, you end up with a 404 error message in the conversion. The big problem here is that the entire post gets deleted in the process, which I've just found out is quite disastrous: https://gyazo.com/07eabe8ded3da65f0f99a58bdea9f5aa

Also, a likely related problem to the previous issue, you cannot preview a post if you include any @ mentions in it.

I'd appreciate if anyone could help me out with those.

Thanks!

Forum info:

vBulletin version: 5.2.4

PHP: 5.6.27

SQL: 3.6.33-cll-lve