Issues with tables | WPforo + Astra theme

Hello! I'm having issues when posting tables in bootstrap as replies or topics in WPForo.

Here's the JSfiddle of what it should look like: https://jsfiddle.net/poowulpi/fs2483bg/1/

But I constantly get this (image attached). Is this a theme issue? Is there some secret code I need to add in?

• I thought WPforo apparently only likes hex colors, not rgb() – but this isn't true, as it will show up fine on the WPForo help site: https://wpforo.com/community/how-to-and-troubleshooting-2/tables-in-topics-and-post-replies/#post-117430

• Tables will not show borders

• WPForo and WP are both up-to-date

• I've cleared my cache on the backend, and my own cache

https://preview.redd.it/b04ee5cnzrod1.png?width=1976&format=png&auto=webp&s=58fb3fdf70684f052151f186e329e13385a16e3f

• I've enabled extra HTML tags: b, em, p, code, style, a(href title), img(src alt title), embed(src width height), table, tr, td, th, thead, tbody, tfoot, strong, u, small, sub, sup, ul, ol, li, div, span, blockquote, rgb(red, green, blue)