On: Named element IDs can be referenced as JavaScript ...

[dwild]

Curiously the article doesn't mentions it, but theses kinds of vulnerabilities are named DOM clobbering if you want to know more about it!

It's weirdly not that discussed on the web, most probably because it require a pretty specific situation.

[stonewareslord → dwild]

Thank you for this! I had a feeling it wasn't a security issue. I closed my ticket saying it might be one due to finding websites mentioning Dom clobbering