TextArea Scrollbar Issue

It seems that a scrollbar will not appear in a TextArea unless the mouse wheel is used to scroll. Once the scrollbar appears after using the mouse wheel it can then be controlled with mousedown and drag as it should. I would think that a mouseover on the scrollbar area should make it appear. I’ve never noticed this before because I use a magic mouse and rub up and down. It was brought to my attention by another user. Is this normal behavior? I have System Settings -> General->Show scroll bars set to “Automatically based on mouse or trackpad”. Of course setting this to “Always” keeps it active always. But I prefer it not appear when not in use. Wish the listbox worked this way - well if it worked right. Mac 2017 R1

Get an eye in General Control Panel (Always show scroll bars ?)…

Not a Xojo thing IMHO.