Iframe macro fails to parse multi part paramaters in URL

Summary

In the iframe since the may 10th update, no longer recognizes data past the first ampersand (& shown as %40) of a URL

Steps to Reproduce

1. add iframe to confluence Page
2. Set a multipart URL, Exe Google Calendar:

   https://calendar.google.com/calendar/embed?title=TEST&src=test%40gmail.com&src=testcalendar%40resource.calendar.google.com&ctz=America/Chicago
   

Expected Results

Tile (TEST), user Calendar (test) , & added calendar (TestCal1) will render in iframe as intended

Actual Results

Nothing beyond First ampersand (&) is rendered and only the title is set:

Notes

Renders correctly for single calendar input:

https://calendar.google.com/calendar/embed?src=testcal1%40google.com&ctz=America/Chicago

Workaround

there is no workaround at this time