Minoston MP21Z failed to update mesh info

Looking for some help. I have 2 Minoston mini plugs (MP21Z) that are working in that I can turn them on and off on my SmartThings hub. However, the main purpose for buying them was for range extension - my Zooz Leak detectors ZSE42 are going offline after a couple days. When I go to do the Repair Zwave Network, these 2 mini plugs always fail with the “fail to update mesh info” error. I know others have successfully used these for this purpose. Any ideas on what I should do? I have tried to run the repair with the plugs right next to the hub and it still fails with the same error.