If you try to open it directly, you'll see an error, when you should be seeing an image.
I see a couple issues with it.
Firstly, URL contains an image proxy. Now, I'm not sure how exactly Lemmy works and if those are necessary, but my comments don't have those (on most clients you can use an option to see the raw comment text).
Secondly, that imgflip URL leads to a page and not to a direct image, which causes issues. If you link the direct image URL like so:
Regarding the podcast you linked, I'm in no way associated with it, if that's what you thought. I'm just using an account on StarTrek.website Lemmy instance because I'm a fuckin' nerd. 🖖
(I also noticed that you switched to using another image 8zyq0d vs 8zykr0, so I'll switch as well to avoid confusion)
It's not a direct link to an image. Use a direct link to an image:
I really appreciate your time, but I don't know technically why I'm doing this, why it works, or how to replicate it going forward. Pretty annoyed with the inability to simply paste or upload.
No problem. If you have more questions, feel free to ask.
I used Sync back in Reddit days, but not on Lemmy, so IDK if that's Sync's fault or your instance's*. Try another client? I'm currently using Voyager. It's like Apollo for iOS, but free.