Trivia: Weird behavior in Chrome

I don't know if it's Chrome or if it's Windows 10, probably chrome. Some
strange behavior lately. But this one takes the cake...

On YouTube. In the search field (text box). This is the text...

MKron intitle:intitle:T-i8

As you can see, the term "intitle:" is incorrectly repeated.

So, I highlight the first iteration of "intitle:". I begin to click and
drag that highlighted text to the beginning of the line, so that it will
end up immediately in front of the first word "MKron".

After dragging that incorrectly placed iteration of "intitle:" to the
beginning of the line, after releasing mouse button, somehow magically
the line changes into this...

downloadMKron intitle:T-i8

Yep. Somehow the incorrectly placed iteration of "intitle:" changes to
"download" when it is dragged to the beginning of the line.

The same weirdness repeats after doing an Undo.

I have seen weirder behavior in Windows, but had never seen that one.
I know a lot about Windows input and output, been using
macroing/scripting for decades, but doubt it's related. I do not know
where the word "download" came from. Do not recall recently copying it.