Below are a few relevant links from the Moove tracker mentioned by Jon:
1. https://github.com/willianmano/moodle-theme_moove/issues/279
2. https://github.com/willianmano/moodle-theme_moove/issues/186
The changes suggested in #2 resolved the frame issues on my demo site.
1. https://github.com/willianmano/moodle-theme_moove/issues/279
2. https://github.com/willianmano/moodle-theme_moove/issues/186
The changes suggested in #2 resolved the frame issues on my demo site.