Error updating VM with a new MIG

[Chema]

I created an Instance Template. Next, I created an Instance Group and selected the Instance Template I created.
And then, I updated the VM to reflect the template but the MIG never turns on healthy.

When I try to update the Instance Group with an old Instance Template it works but not with new Instance Templates.

I'm facing this issue since 16th April, I even tried to build image and Instance Template as the last one that worked for me but still not working. Actually, I don't get any errors, I get a SUCCESS message after executing this command:

gcloud compute instance-groups managed update-instances MY_MIG_NAME \
--instances MY_VM_NAME \
--minimal-action replace \
--zone europe-west2-c

Is anyone else facing this issue?