It's not the same to fill in a form and get a verification code.

The verification code mechanism of the website.

Verification code mechanism of 1. website: Some websites will use dynamically generated verification code pictures to improve security, that is to say, different verification code pictures will be generated every time a webpage is opened or refreshed.

2. Network delay or failure: When the network conditions are not ideal or failure occurs, the loading of verification code pictures may be affected.

3. Technical implementation: Due to different technical implementation methods, the generation and display methods of verification code pictures may be different.