Expression pedal with MC8 & HX Stomp snapshots

I’ve got an expression pedal connected through an MC8 to control a volume block in an HX Stomp.
The preset has 2 snapshots and the volume block is in both snapshots. If the expression pedal is pushed to 100% (fully toe down ) in Snapshot 1 and I switch to Snapshot 2, the volume is set to 0% until I move the expression pedal. I have assigned a switch on the MC8 to toggle between the 2 snapshots so I don’t touch the HX Stomp at all.
Any idea how to ensure the expression pedal stays at the same value when switching snapshots?