blacked out emails (some, not all - not full screen just emails)
Some, not all, of recent emails in my inbox and sent box are blacked out when I reopen them, not the full screen just the email rectangles. previously linked emails are also blacked out.
This is the first time I have this problem.
I tried Shut Down and Restart but the problem persists.
MacBook Air (11-inch, Mid 2011)
System Version: macOS 10.13.6 (17G8030)
No updates available