Noob here so don't lambast me too bad. Anyone have any insight on why an image added to a grid tile by using the "change image" cog winds up floating the image in the center of the page?
Moodle and Grid version? If the issue happens in Boost, then I'll look at it. If the issue is purely Lambda, then its a theme issue and as its a commercial one, it's their problem.
Moodle 3.10.4 (Build: 20210510), Grid 3.1.1.1. I'm a bit nervous about swapping themes and swapping back. Is that a fairly safe thing to do and not risk losing content?
Use https://docs.moodle.org/310/en/Theme_settings#Allow_theme_changes_in_the_URL - and you should not lose content. Also 3.1.1.1?? The version for Moodle 3.1 and not 3.10? What's in the format's readme file, i.e. youtsitefolder/course/format/grid/?
Our Moodle 3.5.5 was working correctly and our last Lambda theme update 1.98.26 borked it like yours. We updated our relevant Grid plugin to 3.5.0.6 - 2018052306 - and it fixed it. So for your Moodle 3.10.4 I'd try updating your Grid plugin to 3.10.1.4