apps/toys HelloTextFlow renders incorrectly on macOS 10.15

[Scott Palmer]

As follow up to JDK-8130738 I was thinking about adding a new panel to HelloTextFlow to show adjusting the tabSize rather than making a new ‘toy’.  However I noticed rendering issues right away.  When you select text, parts of the text seem to paint white-on-white .. proportional to the amount selected.  Try it on macOS 10.15 and hopefully you will see what I mean. I’ve attached a couple screenshots if they make it through to the list…

Is this a known issue?

Scott