"I said you were right" is not doubling down, and looks like an accurate description of the conversation to me. OP got hostile for no good reason. If it's different, they can talk about how it's different instead of going on the attack against someone that listened and tried to provide information.
No hostility just amazing how I can share a datapoint as a long time user that something did interrupt the feed engine in a negative way and I get told it’s normal when in my experience it’s not.
Thanks. Though I do admit that my swipe back at them about "touching grass" was out of line.