Touch selection jumps when spanning over multiple lines

[tomak-git]

Attach (recommended) or Link to PDF file here:
http://www.cedefop.europa.eu/files/czech_republic_-_european_inventory_on_nqf_2018.pdf

Configuration:

• Web browser and its version: Firefox v. 67.0
• Operating system and its version: Windows 10 Pro v. 1803 build 17134.799
• PDF.js version: could not find (default)
• Is a browser extension: no

Steps to reproduce the problem:

1. Open the linked pdf (although the problem persists over many other pdfs I tried).
2. On a touch screen double tap a word to initiate selection.
3. Drag the selection over multiple lines down.
4. The selection jumps and selects text in the opposite direction.

What is the expected behavior? (add screenshot)
I would expect the selection to beahave the same way as when selecting with cursor using mouse or touchpad.

[RBSUS]

Want to bump this. Have there been any developments?

[limonovthesecond2]

The issue is fixed with PR#17923