Glyphs App Forum service-worker.js using 102% CPU

Hi I noticed my fan was running hot on my laptop so I checked my chrome resource usage and it said that was using 102%:

What is going on here – I didn’t even have the forum open. As soon as I closed it the fan stopped running – is it infected?

‪that looks like a workbox service worker (Workbox  |  Google Developers) that is handling caching and listening for new notifications on the forum, nothing nefarious… ‬not sure why it’d spin out of control though

Can you check this happens in Safari, too?