Has tab completion on this forum broken for anyone else or just me?

If I type @co <tab> or @co and click on @cocreature’s name the page seems to freeze for a second and reset. Before I investigate further I’d like to know if this problem affects everyone or just me.

I don’t know whether Tab ever worked for me. If I type @an and hit Enter, it completes to @anthony .

I’m pretty sure tab worked, seems both and clicking on the name work for me now, very odd.