Because Russia actually prefers status quo! It’s a way for them to have a hand in actual country’s (in this case Moldova) inner politics. They are pushing “you’re not hearing us” agenda and are trying to convert the region to autonomous republic inside a parent country with a veto-like rights to have even more influence.

It’s a way to prevent parent country aligning with the Western world.

Also, it’s a known enormous money-laundering hole for Russia’s government schemas.