Why did you break your fast at 23 days? Return of hunger, complications during the fast or just out of time/reached your target?
Chrisb1 has pointed out that it's early days yet for you to get concerned but I'm wondering if your body has an unresolved issue and it didn't welcome the breaking of the fast and as such is resisting the refeeding process.
Another point is that if you're eating more food than the system can handle at this moment in time, you'll be overtaxing your system with negative effects. That may be the message that you body is sending you with the lack of energy.