After watchdog for dual-config is enabled, the FPGA seems like not work properly every dozens of seconds. Why?

Maybe I could and I can have a try if you need.

Anyway, I am sure reconfig didn't happen and just PHY comminication goes wrong. I have two PHY communication path with the same phy chip in my master board which communicate with a slave board which also have two PHY path. In th slave board, One phy chip is the same PHY chip with master board, the other phy chip is different But they can communicate well without enabling watchdog. After I enable wathdog,the same phy chip works well while different phy chip will meet problems like what I mentioned.