Table and image resize are broken in WinUI 3 RichEditBox

### Describe the bug

The RichEditBox allows to resize images and table rows/columns like the native RichEdit control, even if it doesn't display a resize cursor or adorner (as a side note, it would be nice if it did since it's been supported in WordPad for many years).
However, while they work individually, if you have both an image and a table in the RichEditBox content there are visual glitches, it seems the controls doesn't properly redraw itself (please see the GIF below). Selecting all via Ctrl+A seems partially fix this, but often it's impossible to remove the selection from a table or cell by clicking away from it.
This issue only occurs in WinUI 3, not in UWP/WinUI 2.

### Steps to reproduce the bug

I can't find a consistent way to reproduce this (sometimes images work, while for tables always occurs), but generally:
1. Paste an image or insert it using ITextRange.InsertImage()
2. Paste a table from Microsoft Word or another word processing software
3. Try to resize the image and a row or column, alterning between them

### Expected behavior

It should work properly as in UWP / WinUI 2.

### Screenshots


### NuGet package version

WinUI 3 - Windows App SDK 1.6.1: 1.6.240923002

### Windows version

Windows 11 (22H2): Build 22621

### Additional context

_No response_

Start by reproducing the issue in a WinUI 3 RichEditBox using Windows App SDK 1.6.1: insert an image, paste a table from Word, and alternate resizing them. Compare the behavior with UWP/WinUI 2; it is done when image and row or column resizing redraw correctly and selection can be cleared by clicking away.

Written by the indexing model from the issue text.