Problem

I am unable to select an entire heading. I've tried using keyboard shortcuts, the mouse, and other methods, but nothing works. The selection behaves abnormally — as shown in the video, it does a weird thing where it won't fully select the heading text.

Steps to reproduce

Open the app (version 5.1).
Navigate to a heading.
Attempt to select the entire heading using:
- Mouse (click and drag)
- Keyboard shortcuts (e.g., Ctrl+A, triple-click, Inicio + Shift + Fin)
- Any other selection method

Observed result: The heading does not get fully selected. The selection behaves abnormally (as demonstrated in the attached video).

Expected behavior

The entire heading should be selectable using standard selection methods (mouse drag, keyboard shortcuts, etc.), and the selection should behave normally without any glitches.

Selection

As an Editor, I want to select the whole text in a Block.

One Click, Moves the cursor.
Two Clicks, selects a Word.
Three Clicks, Selects a Block.
Highlighting with the mouse, from left to righ

As an Editor, I want to select the Block.

Selecting through the last character = still text selection
Only going past the text to the right = block selection
Selecting up to and including the last character stays text selection.
It does not become block selection just because the whole line’s text is covered.

Debug info

OS: Windows 11
Program version: 5.1