Resolved: Google Calendar in Chrome freezes (100% CPU) when switching from Month view

The cause in this instance was the Calendly Chrome extension with Google Calendar integration turned on.

If I toggled off the Google Calendar integration I could switch from Month view without issue. Confirmed it was really this setting by toggling the integration back on, and the Google Calendar tab would freeze when switching from Month view (https://calendar.google.com/calendar/r/month) to any other view.

Thankfully it was easily resolved by reinstalling the Calendly Chrome extension! Google Calendar integration is working.