My energy did not renew after not playing for hours I came back and had no more energy

Left the game open in iPhone’s discord app at my farm. Returned after 90 minutes, went to the tropical island and my energy was at 5!!! I’d expected the meter to be full. Enjoying the game apart ...

I was trying to remove egg obstacle in tropical island which cost 25 energy and should be finish in 2 mins. But suddenly my connection out and when i get back, the time shows i need 10 hours to be ...