[bug] flag rendering doesn't update upon location change

[L4ZZA]

Describe the bug
Not all the flags are updated according to the location settings. It seems like the first one you choose upon account creation is left cached on the user object on the comments and on the profile details page.

To Reproduce

1. Create an account with any country selected as a Location (i.e. UK)
2. Upon creation completed, go to your profile and change the location to any other country.
3. In the preview it will show the correct one.
4. Click on the preview button
5. see that the flag on your profile page hasn't changed.
6. go to any of your previous comments
7. see that the flag hasn't changed there either

Expected behaviour
all the rendered flags should match the current/latest "Location" setting

Screenshots

Additional context
Could it be related to this? #3131

[davehakkens]

thanks for posting!