Can't interact with some topic creation features

[Timeline15]

Whenever I try to embed an image for a card discussion post, I find that once I've clicked 'image', and put in the url, I can't click 'ok' to confirm it (or indeed click cancel or even x out, I have to close my tab entirely just to get off the page)

I encounter a similar problem with the dialogue box for adding links.

Any idea what the issue could be? Can it be affected by certain internet browsers? I'm on internet explorer(yes I know).

[Dova]

Unsure how to fix that problem, but to add an image, you just have to do:

[img=imagelinkhere] 

So you don't have to Insert the image with the UI.

[Timeline15]

Hmm, well, I had to type the url by hand, because apparently it also doesn't like me copying and pasting into the text window.

It recognised it was a link, but displayed a little 'x' with "formula+synchron.png" written after it.