Frozen Column Header is broken when using with column group

[tmair2-go]

StackBlitz Link

When using column groups and frozen together, the header does not get properly fixed. When using just columns and frozen, there is a slight twisting effect, but it's not a significant issue.

When looking at the elements in the developer tools, I often encounter issues where the left position is calculated without properly accounting for the width of the before columns. This issue seems to occur primarily when there are a large number of headers or when column data lengths cause column width to resize.

Even when not using column groups, there are occasional slight distortions in the columns as I scroll horizontally.

[tugcekucukoglu]

Move to the issue primefaces/primevue#4677