I’m currentely using Komodo IDE v12 on Windows 10 Pro. I am the only team member that has this issue. I tried uninstall/reinstall and repair. I also played with native window borders in preferences. It continues to remain blank. See screen shot below
Try restarting in Safe-mode, Help menu > Troubleshooting > Restart in Safe-Mode. If the problem persists, pleas repro the issue then share your logs, Help Menu > Troubleshooting > View Log File.