I was testing some macros as a player (not as a DM) late last night, and this afternoon when returning to do some more tweaking I discovered that the text chat for that campaign was broken. The recent chat history is missing the chat messages after a certain point (though the full log shows these missing messages), and attempting to use the chat or any macros doesn't work, but causes the formatted ability boxes to collapse: For reference, it normally looks like this: This issue definitely affects both FF 53.0.3 and Chromium 58.0.3029.110 (Ubuntu Linux, 17.04), though I did confirm with several other party members running other configurations that they are affected as well. I got a console log from Chromium: <a href="https://pastebin.com/XB9yEau9" rel="nofollow">https://pastebin.com/XB9yEau9</a> ; the console output in Firefox was for all intents and purposes identical. Since I added/edited/removed macros several times over before I discovered this issue, I cannot determine exactly what kind of macro triggers this bug, but considering that it effectively could remove an entire campaign's ability to use the text chat, I think the issue could be considered fairly serious. At this point, since I effectively can't use the text chat in the campaign to try and reproduce the issue, I'll probably need some assistance from the development team to figure this issue out.