The vertical scroll behavior in the Frozen Columns area is abnormal

[JohnLee]

When using the mouse scroll wheel to perform a vertical scroll within the Frozen Column area, the main grid area does not scroll.

Please refer to the following steps, as a similar issue occurs even when performing these actions on the demo page (https://paramquery.com/pro/demos/freeze_columns).

1. When scrolling with the mouse wheel outside the frozen column area, the grid area scrolls. (Normal)
2. Change the total number of frozen columns to 5.
3. When a cell within the Frozen Column area is clicked, and the mouse wheel is then used to scroll, the entire page scrolls instead of the grid.
4. When scrolling with the mouse wheel in the unfrozen area, the grid area scrolls. (Normal)"

We would appreciate any suggested solutions for this issue.

[jplevene]

I spotted this as well, it is a CSS bug with the JQueryUI themes in pqGrid

On the demos, change to a "Custom" theme and not a "JQueryUI" theme and it is fine.

We use JQueryUI themes, so really need this bug fixed as well.  A fix suggestion is that frozen columns don't have transparency for their background.

It doesn't have to be 5 frozen columns to reproduce the bug, any amount does it.

It is also a bug for frozen rows

[JohnLee]

Based on the hint provided by Jplevene, I have implemented a CSS-based workaround to bypass the bug for the time being.

I noticed that when Frozen Columns are applied, the fixed elements are wrapped inside <div class="pq-cont-inner pq-cont-left">...</div>
To address the issue in this structure, I added the following CSS.
.pq-cont-inner.pq-cont-left {
    overflow-block:auto;
    scrollbar-width:none;
}

[paramvir]

Transparent background in frozen panes while using jQueryUI themes is fixed in v11.1.0