Http request with bg96

we are trying to call an api from BG96 module via serial communication from esp32s3 . we are using the AT commands AT+QHTTPURL, AT+QHTTPGET, AT+QHTTPREAD. when we request to get response from a dummy API, the problem is sometimes we get a 703 error response which corresponds to “invalid url” while sometimes we get a successful response.
The scenario is completely same when we use QNavigator for testing purposes.
thanks in advance.

Could you please share you full test steps?