When you search for a contact and you select the contact.
if you select "add or edit email" on the "home email" it grows bigger and then shrinks to a single line which you cannot edit.
If you select the edit at the top of the contact you can edit it without any issues.
Just upgraded form version 4.7 (used to work with this version)
CiviCRM Version 5.9.0
Wordpress Version 5.0.3
CiviCRM » Search Results » View Contact
SSL only (just switched it)