This is what I do. But with auto-grid off, this will trigger the delation in the actual editor.
And with auto-grid on, I can remove it from the Grid Editor without deleting the actual column, but nothing changes
Sorry to hear you’re experiencing trouble with this.
As we have been unable to reproduce your error on our end, could you possibly provide a temporary access to this installation, so I may see what’s going wrong?
If this is possible, for security and privacy reasons, kindly send the details using our paste website, by sharing the link generated: https://paste.cwicly.com/ to support@cwicly.com or by PM.
In fact what you are experiencing is caused by the breakpoint you have set for tablet view.
As the Gutenberg tablet view is set to 778px in the editor, if you set your breakpoint to something lower (like you did at 768px) you won’t ever see any changes being applied.
So be sure to set your tablet breakpoint to 778px or higher to avoid this issue.