I noticed it was happening in Safari as well (but not Firefox), so digging a little deeper it looks like it was from an extension on my computer that I had completely forgotten about that didn't install per-browser but on the system in general. Disabled it and it's all good now.
Sorry for the double post, but thought I should mention in case anyone else comes across the fix in the future.
In case anyone was wondering, the extension was GlimmerBlocker that was causing it. The simple fix for me adding it to the whitelist. View attachment to see what I added.