The spike in your link's chart clearly starts in early 2020.
And "While our data extends only to 2018" is... important, yeah?
I read this as 2020 was Covid related drop, it then returned to normal for 2 years, then began dropping again in late 2023. The covid blip is explained by what was going on at the time, nothing since 2023 has any explanation and could be flock
i encourage other people reading to look at the chart so they can assess the veracity of ^ comment