If anyone else is experiencing this issue, it's because we added a new way to pass data between pages with this util. If you had an event handler that called utils.openPage, please modify it from:
utils.openPage('newPage', {queryParams: {'nice': 'dog'}})
to
utils.openPage('newPage', {passDataWith: 'urlParams', queryParams: {'nice': 'dog'}})
I'll push a fix out that defaults to passing data with query params that should come out next week! Sorry for the inconvenience everyone