Not necessarily. Start with smallest impact, and build on it. There's a lot of places the error could be introduced. If you run addons, and disabled them for the test, start adding them back one at a time. If all that works, delete the site cookies for this forum. You shouldn't lose anything important. After that, start looking at web storage. You said you cleared cache, but it may have left something behind; perhaps some google libraries. That's the end of stuff I can just think about. I'd have to start poking around and thinking about it in person. I don't use chrome, so there may be something particular about that browser that's messing things up.