"O" button popup is blocking use of small text box anchorpoint.
This problem happens when attempting to resize small rectangle text boxes (smaller than .9") with the bottom/center anchorpoint. When clicking directly on the anchorpoint, instead of being able to drag it up or down to resize, a small pop-up box appears by the "O" symbol that has a check box for "All Small Caps." this disallows me to resize. I'm not clicking the "O." I'm clicking directly on the bottom/center anchorpoint.
This problem affects my workflow every time I use Indesign. I have to instead use the top anchorpoint and reposition. Please reconfigure where the "O" button appears on a text box because it gets in the way of the bottom/center anchorpoint on so many text boxes.
Using version 17.2.1 x64
In Preferences dialog > Advanced Type, there is an option at the bottom called 'Show Adornment...'
Uncheck this option to stop showing "O" on selected Text Frame.
Hope you'll find it useful.