I use junior engineers’ code review submissions as an opportunity to teach, and any senior engineer who doesn’t is committing professional malpractice. They have to learn, and that requires someone (in the case of a code review) to teach them. One can do it without being condescending, though The Socratic method for teaching is actually quite good, and it can be employed without condescension.
I think the real problem here is that because everything is going online-only, we're falling into the trap of making everything public and recorded forever . Maybe I'm just too damn old, but I don't like this trend. When code reviews were in person, as a senior person, I could deliver feedback without that feedback becoming a public albatross stuck around someone's neck. We all screw up and miss things. Sometimes we…
Is this a thing you’ve seen or just something you’re afraid might happen? If the former, I would say that’s an unhealthy work environment. If the latter, then why point it out?