ALL of my comments from 9/12/2020 , and all of the comments from the OP to me, on this question, have disappeared!
Anybody know where/how they disappeared?
Your comments (And OP's comments) have been flagged by users (as no longer needed I assume) and have been removed by moderators.
It's just a typical process of cleaning up questions. Nothing weird has happened here.
You should use chat-rooms for discussions. Comments are for asking more details and clarification. If it's getting into a long discussions you should continue it in chats to keep comment section clean.