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
Courses and course formats
Grid Format with lambda image not lining up.
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