Hi team,
I've run into an issue where on the same URL of a peerboard post, my developer can see a rel="canonical" HTML element from his developer tool while I cannot. Attaching screenshots:

The <link rel="canonical"...> exists on his window

While it does NOT exist on my window.
We've tried checking these 5 URLs just to make sure it wasn't a one-time issue:
https://board.testglider.com/community/post/254977673,
https://board.testglider.com/community/post/1376220902
https://board.testglider.com/community/post/2013287525
https://board.testglider.com/community/post/640253890
https://board.testglider.com/community/post/1490594626
We've checked with 3 other teammates' devices, and only 1 of them had the same issue as I did — no canonicals to be found anywhere.
No one on our team has inserted the canonical tags, so we assume they're auto-generated from Peerboard.
Are there any variables or conditions that the "canonical" tag gets inserted/deleted?
Context:
On checking the SEO performance for our peerboard posts at https://board.testglider.com/community/, we've run into 76 unindexed posts because they are considered "Duplicate without user-selected canonical."
We're just trying to make sure which pages have canonical tags and which we need to insert manually on our end!