[sqldba]

They have another firmware bug that has been going on for years and years and was never fixed.

If you type quickly, it can lose the case of the characters in combination with the shift key.

Hold down the left shift and type CSMSDC. One of them will be lowercase (from memory it's the S). If it doesn't happen for you, either it's not a Sculpt, or you don't type fast enough. Once you can do it it'll happen every time.

[chadaustin]

I use dvorak as my primary layout and hadn't observed any ghosting, but I can reproduce your CSMSDC case!

Interestingly, I tried it on my modded keyboard and it works properly. :) QMK must correctly handle the lack of NKRO diodes on the matrix.

[ComputerGuru]

It’s not a firmware issue, it’s n-key rollover with poor matrix choice. There’s no fixing it short of replacing the controller with one that can handle more keys.