Version 7.6.6 Lead Form Display Problem with Suite 7 theme and the Suite R themes

Both the Suite 7 theme and the Suite R themes have display problem for the Campaign > Create Person Form with Version 7.6.6. See images. The create form is unusable with the Suite 7 theme and partly broken with the Suite R theme.

Create Person Form UI works perfectly in version 7.5.3. with both themes.

Please let me know what to edit to fix this.

I can second this behavior on Suite P, 7.7 as well
https://aaron-liiramedia.tinytake.com/sf/ODkxMjYzXzM4MDM5MDU