Question: why command completion popup behave different when using ?command

In worksheet mode, when typing only the first 3 letters of the command piecewise, the command completion popup shows and I can hit TAB to have it automatically complete which is nice since I always makes typos tying this command


When when I wanted to get help on the same command, I have to type 5 letters now before the popup shows to help me complete the command


Why is that? I would have expected the same 3 letters to be enough, as I assume Maple is smart enough to notice this.

Here is a movie to illustrate. This is Maple 2021.1 on windows 10


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