Hierarchical grid: It is not possible to dynamically add a row island when the level depth exceeds 3

[viktorkombov]

Description

When attempting to dynamically add a row island at a level depth greater than 3, the row island does not appear. However, it is possible to add row islands at higher levels (e.g., levels 1 and 2).

• igniteui-angular version: 19.0.x, 19.1.x
• browser: any

Steps to reproduce

1. Open the provided sample - here.
2. Expand rows to navigate to level 2.
3. Click the "Show Nested Row Island" button.

Result

• The row island at level 3 is not displayed.
• If you click "Show Row Island", only the row island at level 1 is displayed.

Expected result

What is the expected result after following the steps to reproduce?

Attachments

It should be possible to dynamically add row islands at any level depth, including levels greater than 3.