Unfortunately I fell into the same trap. My system - although locked - installed 7.6 final but did not upgrade the Kernel.
Cleaning the yum cache helped. But know with the new Kernel the system still seem to have issues such as
- Chron / logrotate creates files with xxx.log.1 instead of xxx.log-20181217
- The system in bridge mode does not show the external IP in diagnostics
- I need to reboot my switch everytime I restart nethserver (seems to be someting strange with the network interface)
- TLS Handshake and log-on to Nextcloud (14.04) takes much longer as before.
I’m running NS as a Guest in HyperV 16.
May be it is just a misconfiguration or do I need to add additional repros? Does it make sense to investigate further or is there an easy way to go back to NS 7.5.