I just pinged my group and it broke the entire site for me as long as the event existed. Here is a screenshot example; LINK
T_T
I had that issue too with your ping.
For the issue stats:
I am on a samsung galaxy note 8 using Chrome.
Closing the tab and site didnt fix it. Only fixed when I cleared the event. 
had the same issue, sent me a screen shot. CLICK CLICK
I'm really wondering if it was having the brackets in the title? I always use them though and have pinged boards just two days ago with them in the title so ?? I'm not sure :C :C I'm so sorry you guys AHH
Same thing happened to me! I didn't get a screenshot of it, though! I even went and cleared out my cache/cookies/etc because I thought it was a Google Chrome issue.
Once I cleared the event, the site went back to normal, but that was very odd.
Oh hey I managed to find the report. So clearing the event works? I’ll try that.
Edit: yay that worked

i had SOME issue with this too, but the ping just made all the font under it in my events sidebar reeeeeally teeny tiny; screenshot! the rest of the site layout is unaffected for me & I'm on fully updated chrome & windows 10.
i AM using custom CSS that affects the sidebar, so since that might help?? here is what i'm using;
vars' custom css ho ho ho
/Forum design tweaks, looks better and tighter post spacing./
.posts .post {box-shadow:none !important;}
.ui.attached.segment.post.regular {border-radius:0 0 5px 5px;}
.posts .post {padding:0 12px !important;}
/Move all floating items to top left corner/ .floating_item {position:fixed !important; left:20px !important; top:7px !important; z-index:999 !important; box-shadow: 1px 1px 5px ;}
/Remove page footer/ footer {display:none;}
/shop padding shit/ .ui.grid > .row { margin-top: 1.0%; padding: .1rem 1% 1%; } .ui.celled.grid > .column:not(.row), .ui.celled.grid > .row > .column { padding: 0.1em; } .ui.center.aligned.segment { margin: auto; width: 85%; }
/Better Sidebar Events & Easier Event Deleting/ -inner-events .event-sep {width: 90%; margin: 2px auto;} .sidebar-widget {width: 163px;} .sidebar-event {position:relative;} .sidebar-event i {position: absolute; right: 0px; top: 2px; margin: 0; cursor: pointer; height: 1.3em; width: 1.3em; padding-top: 2px;} .sidebar-event small {width: 100%; padding: 1px 14px 2px 3px; overflow:hidden; line-height:1.5; display:block;} .sidebar-event small a {padding-bottom: 0.4em;} .sidebar-event small {font-size:85%;}
/right align remove event icon/ .sidebar-event {position:relative;} .sidebar-event i {position:absolute; right:1px; top:4px; margin:0;} .sidebar-event small {display:block; padding:0 1px; line-height:1.5; width:89%;}
/* better hustler */ .hustler { overflow:hidden; border-bottom:none; } .hustler div { z-index:3; } .hustler div[style="width: 80px"]+div+div.text_center { z-index:1 !important; } .hustler .wl_item.wishlist { background: ; box-shadow: 0 0 0 100vw ; } .hustler .wl_plus { top: 21px; }
It looks like the title cut itself off before the closing bracket - I think that might have been what did it?

I am having the exact same problem. everything is broken except the news pages and forums! lol
[edit] Mine is now fixed... strange! lol
Public Ping Group - Xanadu Galleria and RAE Collab
I really really extremely want: