The in operator (along with other things) is designed poorly.

[Ruby The Roobster]

On Tuesday, 31 May 2022 at 00:48:57 UTC, Ruby The Roobster wrote:
> On Tuesday, 31 May 2022 at 00:16:46 UTC, Ruby The Roobster 
> wrote:
>...

Nevermind.  This isn't a bug, and it isn't really an issue.