NAT Reflectiion Two WAN's

[Galbiere]

Hello,
I'm a beginner in the forum and I would like to take a question
When I had 1 WAN nat reflection worked perfectly, now I have two WAN and it stops working on some requests and on others it works.
I have the impression that in some requests it changes the link and nat reflection does not work, I have tried some things more without success.
Does anyone know what it could be?
My application is a website on port 8081

Thank's

[heper]

Perhaps use proper DNS instead?