Calico internode comm. seams to be broken

Sorry if this should be elsewhere, can’t find a RKE topic…

I’ve try deploying RKE1 cluster with Calico on Flatcar, using the RKE way:

+

Or the Calico way (probably similar):

(adjusting the flexvol and cidr)

All my attempts, the internode comm. test fail between diff. nodes:

Any idea is welcomed!

Finally, I will work on the addon installation of Calico through it’s Helm but it is working with this YAML as an addon:
https://cluster-api.sigs.k8s.io/user/quick-start.html#deploy-a-cni-solution