Input field losing focus when used in a cell of a MultiColumnTreeView

Reproduction steps:

1. Open the attached project “MultiColumnTreeViewInput”
2. Enter Play Mode
3. Try inputting any value in any of the Input Fields in the last three rows

Expected result: It is possible to change/add a new value to the field
Actual result: No value gets added because the field gets unselected

Reproducible with: 2022.1.24f1, 2022.2.1f1, 2023.1.0a22
Could not test with: 2020.3.42f1, 2021.3.15f1 (no “Multi Column List View” feature)

Reproducible on: MacOS 12.2.1 (Intel), Windows 10