Something bad is happen.Too many orphan blocks...for some reason my old AMD FX-8370 CPU is finding more blocks as my intel i9 CPU.
Hmm... how many connections does your node have?
If you open and forward port 51339 your node will have more connections which will reduce orphans.
Most people are mining happily.
Have you updated your wallet?
If you want to compare the results of different CPUs you have to let them run for a long time to get meaningful statistics, not just a few hours.