Something strange happens when hitting `h`/`left` in TUI mode

Describe the bug Something strange happens when hitting h/left in TUI mode

To Reproduce Steps to reproduce the behavior:

1. Open wide file (that not fits on screen) in TUI mode ($ glow -t wide.md).
2. Press l/right to scroll righ.
3. Press h/left to hopefully scroll left.
4. Find yourself in a strange place with no clear way back.

Expected behavior

1. h/left scrolls left. or
2. Help menu (?) clearly states what h/left does.

Edit: I found no way to scroll left at all. Like once you scrolled right - you're stuck there.