docs: add handling callback failures section to entropy best practices

pages/entropy/best-practices.mdx

@@ -15,6 +15,21 @@ to submit the necessary transactions.
 
 The gas limit for each chain is listed on the [contract addresses](./contract-addresses) page.
 
+## Handling callback failures
+
+While the default entropy provider is highly reliable, in rare cases a callback might not be received. This typically happens when there's an issue with your contract's callback implementation rather than with the provider itself. The most common causes are:
+
+1. The callback function is using more gas than the allowed limit
+2. The callback function contains logic that throws an error
+
+If you're not receiving a callback, you can manually invoke it to identify the specific issue. This allows you to:
+
+- See if the transaction fails and why
+- Check the gas usage against the chain's callback gas limit
+- Debug your callback implementation
+
+For detailed instructions on how to manually invoke and debug callbacks, refer to the [Debug Callback Failures](./debug-callback-failures) guide.
+
 ## Generating random values within a specific range
 
 You can map the random number provided by Entropy into a smaller range using the solidity [modulo operator](https://docs.soliditylang.org/en/latest/types.html#modulo).