Hmm, even though that's a bit of a stretch that actually makes sense. Also Russia seems like the only geo-political adversary that could pull this off and have a vested interest in keeping Cuba in their sphere.
After the Trump administration reversed the previous administrations opening of Cuba, Russia has increased diplomatic relations with the island nation. The trade between the two has doubled
The important aspect is the rate of increase. Beyond that, Russia is still Cuba’s largest creditor. They may not have the same influence as the USSR but they still have considerable leverage