The fuel has no more timer

Yes, it's a known bug on which EA are working ,but for now here is a fix:
After purchasing Fuel for 30 Gold it is working again.
Not the best way since it is a bug, hope EA will offer a refund for it later.

Buying fuel helped  only for a certain time. 6 hours later it is all the same  again. It is no permanent solution.

I did the "fix" buy refill for 30 gold and it worked for a few hours. Now it stopped working again. I don't want to have to use 30 gold several times a day for my fuel gauge to work properly. Huge problem with game play and user experience. 

Yes ,seems you are right.
But I noticed if you don't fully deplete your fuel and leave 1/10 it keeps refueling

Mine is at 1/14 right now and not refilling.........😡

Then the only thin you can do is wait, don't waste your Gold as no one know if you will get refund because of that bug.
FireMonkeys are based in Australia right now it is 6:00 in the morning there so I believe in couple hours they will start working and will fix the bugs.

I tried "cleaning" iPhone's memory by holding down the "power/sleep" button and when the slidding "power off" switch appears, I hold the "home" button till the screen brights on white... nothing. Does their servers shut down?

They are working on it .