I think I’ve figured it out! Pre 2.0, the synth would receive both NRPNs AND CCs even with its receive setting at NRPNs. This was always a bit strange but I took advantage of it by sending CCs to the synth for modulations as they use up less midi bandwidth, only for the parameters of course which CAN receive CCs, some NEED NRPNs. So the LFE was clever and used NRPNs when it needed to but otherwise used CCs to minimise bandwidth. With 2.0 they’ve changed it so when set to NRPNs, it ONLY receives NRPNs, not CCs. So I’ve now changed the table that tells the LFE whether to send an NRPN or CC for each parameter and then now all use CCs. Easy fix - sorry for the false alarm but I don't seem able to edit the original post.