(Deep zooming) Can not pan after releasing only one finger after pinch zooming

[cLick1338]

Checklist

• [x] I can reproduce the bug with the latest version given here.
• [x] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [x] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [x] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [x] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [x] This issue contains only one bug.
• [x] I have read and understood the contribution guidelines.

Affected app version

1.8.0

Affected Android/Custom ROM version

Android 15 / crDroid 11.9

Affected device model

LG V30

How did you install the app?

F-Droid / IzzyOnDroid

Steps to reproduce the bug

1. "Allow deep zooming images" must be enabled
2. Open a picture
3. With two fingers, (un)pinch to zoom in
4. Release only one finger and try to pan with the other
5. Place the finger back and try to zoom in/out or pan

Expected behavior

According to touch input: At step 4, the image should be panned. At step 5, the image should be zoomed or panned.

Actual behavior

After step 3, when one finger is released, no further pan/zoom happens despite user input: At step 4, the image is not panned at all. At step 5, the image is not zoomed nor panned at all.

Screenshots/Screen recordings

https://github.com/user-attachments/assets/9769d716-7097-4836-9976-a467c246e653

Additional information

With deep zooming disabled the sequence works as expected. I toggled every setting in the deep zooming category but they do not seem to influence the bug.