Cursor jump to somewhere

[ChungZH]

Description

When I type in a code block, the cursor jumps to somewhere.

• Can you reproduce the issue?

Steps to reproduce

1. Insert a code block
2. Type something...
3. At last cursor jump to somewhere

Expected behavior:

Normal

Actual behavior:

Jump and jump.

Link to an example: [optional]

Versions

• Mark Text: 0.16.0-rc3
• Operating system: Windows 10

[fxha]

Thank you for taking the time to report this issue. We cannot reproduce this issue, could you please provide some steps how the error occurred or provide a file.

[ChungZH]

1. Use monospace font with programming ligatures (I use Fira Code)
2. Input ... or some other characters, can trigger the ligature of the font
3. Delete them

[YalandHong]

As far as I know (#2428 (comment)) (#2802 (comment)), this bug is more likely to occur when you delete a certain line in a code block.

[YalandHong]

#2013 and #2306 still exist in 0.17.0. I'm using Ubuntu 20.04. There're two major problems within code block:

1. MarkText automatically adds or deletes trailing empty lines.
2. Cursor jumps to a random position after deleting a whole line.

Kazam_screencast_00004.mp4

random_cursor_jump.mp4