When you select text in the console and click away or scroll sometimes the text will become invisible...
MCL-1344
Glitch console in new launcher
Resolved
Incomplete
0
Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report here.
Personal Note: I have seen this issue before on other programs and it resolved when I updated my graphics driver. Have you updated your graphics driver since May/June?