Waterfall to Waterfall will report an error

I used a waterfall to my other waterfall, but this error will be prompted, how can I solve it?

The error message is as follows:
overflow in packet detected! A string had more data than allowed

nesting proxies is known to cause issues and in general is unsupported, if you can work out what overflowed we may care to fix it but there is generally 0 interest in wasting our time on this. If you need nested proxies for some reason, you’d be better off using something more “dumb”, like HAProxy