An odd issue. I’ve noticed that while on lemmy.ca some thumbnails seem to show up but way less than when directly on other lemmy instances, even when in the same community.
Is there some issue here? Or maybe some setting to show or not show thumbnails, either in the instance software or in the user settings?
Only thing that I can think of is that the instance did not have the time yet to download the thumb before you came across the post.
Could be, but some of the posts are hours or days old, and thumbnails seem to show up fine in other instances but not in lemmy.ca.