After some investigation we have discovered this is caused by a bug in Safari on iOS 14. As a workaround, you can do the following:
1. Press the Share button in Safari.
2. The share sheet will be displayed but Paprika 3 may be missing from the list of icons.
3. Press the X button in the corner to dismiss the sheet (iPhone), or tap outside of the share sheet to dismiss it (iPad).
4. Press the Share button a second time. You will see many more apps listed the second time the share sheet loads, and Paprika 3 should now appear in the list.