We have an LB that has 4 members, and the requests for the ip member 10.58.42.39

Can you explain better the problem? Is the traffic going to the pool member but not returning?

Can you run these commands (replace the <> with the correct information)?

tmsh list ltm pool 
tmsh list net self
tmsh list net route
tmsh list list net route-domain
tmsh list net vlan