TreeGrid excel style filtering is broken.

[MayaKirova]

Description

When unselecting an item from the excel style filtering, the whole grid becomes empty.

• igniteui-angular version:
• browser:

Steps to reproduce

1. Open any sample with excel style filtering, for example: https://www.infragistics.com/products/ignite-ui-angular/angular/components/treegrid/excel-style-filtering#angular-tree-grid-excel-style-filtering-example

But same happens in dev samples too.

2. Open excel style filter and unselect an item, for example the first one.

3. Hit Apply

Result

The whole grid becomes empty.

Expected result

The rest of the items that were not unselected should remain in the data.

Attachments

Attach a sample if available, and screenshots, if applicable.

[kdinev]

@mddragnev I isolated the regression to have originated in the performance improvements filtering change. It's reproducible only with hierarchical tree-grid filter in ESF, which you can reproduce in this demo: treeGridGroupBy