Sometimes when using the indent sliders in the ruler, the adjustment does not
stick. The text doesn't indent and the slider just returns to its original
position.

However, it doesn't immediately bounce back. It hangs out where I drug it
(though the text remains unaffected) until I perform any other operation.
Then I have to reselect the text and do it again. The second time around, it
works.

This seems to mainly happen with the first-line slider. I've noticed this
idiosyncrasy in previous versions of Word as well.

Any ideas as to why this happens (and how to avoid it)?

THANKS!