Tame budgie going untamed because finches in room?

It's possible your finches could be distracting your budgie and that's why he's become less tame. I used to have my budgies and finches in the same room but my budgies still remained tame. All budgies have different personalities, so you never know what is going to happen with housing them in the same room together. I'd suggest placing the budgie or the finches in a different room. If your budgie was once tame, it shouldn't be too difficult to get it tame again.