Location sharing when already set to "ask every time" unable to update to current location

Guidelines

• 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

Steps:

• In Settings - Apps - Signal - Permissions: Set Location to Not allowed, then set to Ask every time.
  • This toggle seems needed to reset some state, but I think reproduces the natural "first install" state of the app and the issue as I first saw it.
• In Signal: open a chat, tap +, Location.
• Signal shows a modal, Allow access to your location with Not now and Continue options. Tap Continue.
• Now we see the OS permission modal: "Allow Signal to access this device's location?" with a toggle for Precise and Approximate location, and a choice of While using the app, Only this time, and Don't allow.
• Choose Only this time.
• First (part of the?) issue: Modal closes, we're back in the chat, but nothing has happened.
• Tap +, Location again.
• Main (part of the) issue: Map display showing a recent location without the breadcrumb that used to enable us to update location that used to exist (blue dot?). Waiting does nothing, we're stuck in this past location that seems to be up to hours out of date.

I remember this working, could this regression be related to the fix for #14761?

Screenshots

No response

Device

Google Pixel 10 Pro

Android version

Android 16 build CP1A.260505.005

Signal version

8.14.3

Link to debug log

I haven't created one yet: Do debug logs contain location info?

Start by reproducing the Android permission sequence in the issue, especially choosing “Only this time” before opening the location picker again. Trace the Signal location-sharing flow and permission handling to determine why the map shows an old location without an update control; done means the current location can be obtained and shared after that permission choice.