author here: I couldn't remember clearly if the issue that was fixed was the block cursor one or something else. It would prove logical that the only one I can remember is the actual issue discussed, but I can't be sure.
Aside the focus was on the act and impulse rather than the actual issue.
Aside number two, I had a few glasses of red wine while writing this. I find it helps get the words flowing, but the memory fuzzy. ;)
I just noticed that the plugin was last modified a year ago, but your story was written last week. It makes sense that the exact issue would be forgotten with time. I've had similar instances where I've forgotten the exact issue but remembered the general lesson.
Yet, none of them came out with a new editor.
Ah! I finally remembered what the issue was! I updated the post with what the offending issue was.
If you don't want to install that plugin, you can get a more visible cursor by adding "caret_style": "wide" and "highlight_line": true to your Sublime preferences.
I'm not sure why the author avoided mentioning the specific issue. If it affected him and his friend, it seems like he would want to err on the side of telling others about it.