I'm using Firefox (beta) and uBlock Origin too, so that could be a common factor. But it varies from load to load. Sometimes it's completely fine. So I don't think it's likely to be a simple rendering bug.
I've been using Firefox and uBlock Origin for years, and LinkedIn more over the last year. I only noticed rendering problems in the last couple of months.
(Plenty of other bugs. Search is unreliable, and the mobile app is not without bugs either (some buttons don't do what they're supposed to), but rendering seems ok on mobile.)
Edit: it doesn't even work correctly using chrome without any ad blockers...
It was always lousy, but it's getting worse.
Lastly, I manage groups with hundreds of thousands of people, and I can't get anyone on the phone for anything.
After the countless hours I've spent on LinkedIn, I'm now focussing my energy on ultimately moving away from the platform.
It's so disappointing that I don't want even to log in to see the mess. No joke, this week, my assistant told me "that thing that's been broken and annoying for months was finally fixed." That thing was merely "approving" content in the group moderation queue. Some posts simply wouldn't be approved...
My strategy used to be "build a community using LinkedIn groups."
Now it's "do everything to capture the value I already created in the groups by directing members off of LinkedIn."
It gets worse.
You can't trust their documentation. And I'm not talking about the API. Even information in their help section is factually inaccurate. And it remains published. When confronted, the issue will get escalated until someone comes up with a roundabout excuse for why the published information is correct, but not practically.
I knew better, but I still fell victim to the building on someone else platform problem.
Never again.