Whether external communication is possible by sharing RG500Q-EA in a redundant system

Is there a way for two AP modules to communicate externally through RG500Q using Ethernet I/F as shown below?

Communication is successful with a single AP module, but when two AP modules are connected, communication with the outside is not as desired.

The 8035 is used locally to realize such operation, and the Internet can be pinged through. What do you mean by abnormal communication? thanks.