That may have been a convenient excuse for the initial temporary suspension, it sounds better than a shortage of cabin crew.
Long term it was never going to last. Painfully low yielding (was moved to Gatwick so it could use the highest density aircraft), not helped by the airspace closure in Russia and Afghanistan meaning it had to take a longer routing into stronger headwinds Westbound. Throw in security issues and high levels of crew sickness associated with it. This was a Covid route, finding use for aircraft whilst other markets remained closed. Now they have a better use for the aircraft, in this case the return of LGW-MCO in the winter, it didn’t stand a chance.