Whole page of text disappears when I highlight something to copy or correct it. Am using MacOS El Capitain and CS6. The text is still there and will come back, but this is very annoying. I see that other people are having the same problem but no one has found a solution yet.
What is up with Adobe - no longer providing any tech support for its products? I am very disappointed in the company.
CS6 has reached end of life and is unsupported under El Capitan. There will be no further updates.
As for solutions, your best bet is rolling back to Yosemite or upgrading to CC if trashing your preferences doesn’t work.
I noticed in another discussion that folks using CC are having the same problem.