Mouse selection excludes last character

[DuckDuckWhale]

Summary

As title.

Reproduction Steps

I tried this:

1. hx
2. Type some words
3. Press and hold with mouse cursor on a letter until an ending letter

I expected this to happen:

The ending letter is included from selection

Instead, this happened:

The ending letter is excluded from selection

Helix log

No response

Platform

Ubuntu 22.04

Terminal Emulator

GNOME Terminal 3.44.0 for GNOME 42

Helix Version

22.05-33-g0035c29f

[CptPotato]

Also: selecting backwards with the mouse will exclude the last character (the one which was clicked first). I think this might be related or even the same issue.