In this Interactive Grid, the MGR column is shown as a Popup LOV, which has a default Sort Order on D (Ascending, Nulls Last).
When editing this cell, the D column is sort correctly BUT it has the icon (and hover) "Descending".

It's just a small bug, but it can be annoying.
Seen in Apex versions 24.2.3 and 24.2.13.
Thanks to William for finding this one.

Page

Identification
	Page ID	1198
	Name	Apex - Interactive Grid - Popup LOV Sorting
	Page Alias	APEX-INTERACTIVE-GRID-POPUP-LOV-SORTING

Region

Identification
	Sequence	30
	Title	IG
	Type	Interactive Grid
Source
	Location	Local Database
	Query Type	SQL Query
	Region Source	select e.empno ,e.ename ,e.mgr from emp e

Report Column

Definition
	Column Name	MGR
	Type	NATIVE_POPUP_LOV
Heading
	Column Heading	Mgr
Column Definition
	Type	Shared Component
	List of Values	P1198_EMP_LOV
	Display Extra Values	Yes
	Display Null	Yes

List Of Values

Name
		P1198_EMP_LOV
Type
		Dynamic
Source
	Query	select ename || ' (' || trim(empno) || ')' as d , empno as r from emp
Column Mapping
	Return	R
	Display	D
	Default Sort	D
	Sort Direction	Ascending (Nulls Last)
Additional Display Columns
		D, R