DNS Resolvers drops the http-request header

I got following issue, please help

haproxy.cfg

resolvers awsvpc

        nameserver vpc 169.254.169.253:53

        hold valid           10s

backend myweb

        http-request set-header myheader 123

        server disabled-server 127.0.0.1:1 disabled

        server srv reader01-1111111111.us-east-1.elb.amazonaws.com:80 check port 80 resolvers awsvpc inter 2000 fall 5

ALB listen rule

With the above backend setting, the request does not match the rule but it works without resolvers
server srv reader01-1111111111.us-east-1.elb.amazonaws.com:80

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