Scroll bar should not extend into sticky header for mat-table. · Issue #11924 · angular/components · GitHub
cdk-virtual-scroll-viewport][mat-table] - sticky headers is not working properly when combining mat-table with cdk-virtual-scroll-viewport · Issue #18240 · angular/components · GitHub
Angular (forked) - StackBlitz
Angular Material Table Dynamic Columns|Dynamic-columns-mat-table