Similar to this issue: https://theeventscalendar.com/support/forums/topic/google-calendar-import-contains-markup/
However, simply stripping the tags out is not an acceptable solution. We lose all line breaks that way, and the content becomes difficult to read. The iCal export works exactly as expected, it’s just the Google Calendar one that’s wonky.
Also, although the above linked thread indicates it was slated for a fix about a year and a half ago, we’re having this issue and we have the most recent version of the plugin installed (and we have a pro license).