Description:
'Alt+down' (or 'Selection list' in cell contextual menu) is pressed to choose a text value in a column wit many text values. A dialog with the above values appears. The 'down' key is pressed to move down the list but the dialog immediately closes entering in the cell always the first item on the list.
The correct behavior should be that that once the dialog is opened the 'down' key should allow one to scroll through the list to choose wanted text value.

Steps to Reproduce:
1.Press 'Alt+down' in a cell part of a column with many text values to open 'Selection list'.
2.When 'Selection dialog' appears with text values press 'down' key to to move down the list.
3.the dialog/list with the text values immediately closes entering in the cell always the first item on the list.

Actual Results:
The dialog/list with the text values immediately closes entering in the cell always the first item on the list.

Expected Results:
Once the 'dialog/selection list' is opened the 'down' key should allow one to scroll through the list to choose wanted text value, and then press 'return' key to enter in the cell.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Using LibreOffice downloaded from document foundation site. Same bug found in version 6.3.5 . It is working properly in version 6.2.
Tested with a clean new user profile. It happens both with OpenGL enabled and disabled.