I used SQLx with an SQLite database and ran into connection pool problems that would cause the database to be unexpectedly dropped.
The issues I saw seem to be related to these issues:
https://github.com/launchbadge/sqlx/issues/3080
https://github.com/launchbadge/sqlx/issues/2510
The problems did not manifest until the application was under load with multiple concurrent sessions.
Troubleshooting the issue by changing the connection pool parameters did not seem to help.
I ended up refactoring the application's data layer to use a NoSQL approach to work around the issue.
I really like the idea of SQLx and appreciate the efforts of the SQLx developers, but I would advise caution if you plan to use SQLx with SQLite.