Key Takeaways
The policy is chosen when you create a fund and can be changed under Fund settings in the action menu.

The fund's Overview tab shows a red notice with a Review holdings button, and the fund's status changes to Needs review. The Screening tab lists the affected holdings.

At the same time a Compliance Changes email goes out. It names the fund, the holding, and the action that will be taken.

For funds set to sell, nothing happens for 24 hours. During that time you can change the fund's policy, or sell earlier yourself. After 24 hours the sale is placed at the next market open. This window can be switched off under Settings → Safety, which we do not recommend. See Safety and disconnecting.
A holding moving to doubtful is not a breach. It stays if the fund allows doubtful stocks and is treated as non-compliant if not. The same applies to unrated. Both are set per fund in the same settings form.
I set "sell immediately" but the stock is still there after a day. Sales run at the market open following the 24-hour window, so a weekend adds time. Check the fund's Activity tab for the scheduled sale.
The rating changed back. Will Amal buy it again? Not on its own. The next rebalance includes it if the source fund still holds it and it passes screening.
I disagree with a rating. Email support with the ticker. Ratings follow AAOIFI standards, and we will explain the specific ratio that failed.