Since a month or two I had the weird experience that during a reboot the ifcfg-mynic got overwritten by a DHCP config, where I had a static ipv4 config created during installation.
Two weeks ago I opened a support case and this morning the engineers found that the clevis-dracut rpm is the cause of this behaviour.
The symptom was found by this command:
It was performed on an extracted sosreport.
--> https://access.redhat.com/solutions/3221171 shows you 99% of the solution.
The last 1% for me was, as I do not need the clevis-dracut rpm:
yum erase -y clevis-dracut