Question on Routing when F5 is Default Gateway

I have a setup where the F5 serves as default gateway for 25 VLANs on the DMZ. The F5s default gateway is a Palo Alto 5000. The Palo has a route to 10.10.0.0/24 via 10.1.0.2 and is redistributing that route via OSPF. The F5 has a IP-forwarding virtual server configured.

PA (10.1.0.1/28) <--VLAN 1--> (10.1.0.2/28) F5 (10.10.0.1/24) <--VLAN 10--> Server (10.10.0.100/24)

Here's my conundrum:

1. Pings from the PA to 10.1.0.2: successful
2. Pings from the PA to 10.10.0.1: unsuccessful
3. Pings from the PA to 10.10.0.100: successful
4. Pings from the F5 (VLAN 10) to 10.1.0.1: unsuccessful
5. Pings from the Server to 10.1.0.1: successful

All in all, the setup works but if I try to ping or traceroute from interface VLAN 10 on the F5 to anything left of the F5, I receive "Destination Host Unreachable".

Any ideas?