Dismissing the OSK by scrolling results in an extra scroll upon releasing touch

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• I have searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• This isn't a feature request or a discussion topic

Bug description

As you scroll through chat, once your finger reaches the edge of the on-screen keyboard (OSK) the keyboard starts to get pushed off-screen. Upon releasing your finger, the chat abruptly scrolls a little more for no apparent reason and it is jarring and can be confusing. It should be smooth and seamless like iMessage. This is a small but noticeable QOL issue.

Steps to reproduce

• Scroll through a conversation until your finger fully pushes the OSK all the way closed
• Release your finger
  • Observe the sudden and unprovoked extra scroll up

Actual result: The chat suddenly scrolls more than expected which can be mildly frustrating and harms the user experience, as it can be confusing and requires manual re-adjustment.

Expected result: Like iMessage (iOS' default text app) the keyboard should dismiss but the conversation should not be scrolled like crazy. It should be a seamless gesture.

Screencasts

Device info

Device: iDevice X

iOS version: 15.8.2

Signal version: 7.23 (258)

Start by reproducing the gesture in an iOS chat conversation using the steps and screencasts in the issue. Trace the scroll behavior while the on-screen keyboard is dismissed; done means releasing the touch no longer causes an additional unexpected scroll.