ChatGPT ask assistant - intermittent error testing in flow builder

The community member is experiencing an intermittent error when testing from the flow builder, where an 'An error occurred' and 'failed to send the reply' pop-up appears with no details. However, the published chat appears to work without issue from the webpage it's embedded in. The community members are unsure if this error is expected or preventable, and are requesting more information to debug the issue. They are also asking when the error occurs precisely and at which type of block.