External badge image not displayed in some cases

Prerequisites An outgoing server configured (mailcacher or similar). One Badgr account on badgr.io with some badges and a collection (you'll find one testing account in the "Moodle testing accounts, data & credentials"). At least one of these badges should have filled the image author name/email/URL or image caption (in the testing account, that's the "Literature expert" badge). Debugging for developers enabled in Moodle. Setup Login as admin. Go to "Preferences / Badges / Backpack settings". Connect to the backpack using the Badgr.io account. Open the verification email and open the URL to validate the account. Confirm  status is set to Connected. In the "Badge import settings" section (in the "Backpack settings" page), select at least one collection with badges and save changes (if you are using the testing account, you should select the "All my badges" collection). Testing scenario 1: The fields are displayed properly Login as admin. Go to the user profile page. Check there is, at least, one badge in the "Badges from other web sites:" section. Check the following warning is not displayed: "Warning: htmlspecialchars() expects parameter 1 to be string, object given in moodle/lib/weblib.php on line 100" Check the "alt" attribute for the badge image is the caption defined in the badge (if you're using the testing account, the caption for the "Literature expect" badge is "Library with a door"). Open the badge containing author/caption information from the "Badges from other web sites:" section (if you're using the testing account, that's the "Literature expert" badge). Check the following warning is not displayed: "Warning: htmlspecialchars() expects parameter 1 to be string, object given in moodle/lib/weblib.php on line 100" Check the "alt" attribute for the badge image is the caption defined in the badge (if you're using the testing account, the caption for the "Literature expect" badge is "Library with a door"). Check the "More details" section is displayed (only for master branch). Check it contains author and caption fields (only for master branch).