I was thinking that. The most plausible reasoning I've seen for Russia's recent behavior along those lines is Putin is mostly concerned with his personal power and position in Russia.

The Ukraine war doesn't make him look very good in Russia - a lot of dead Russians and burning oil facilities in return for occupying some bombed out land where the people hate them.

If he gets into a low level fight with NATO then he can sell it at home that they are in a noble war with a much larger enemy rather than getting beat up by a small and largely peaceful neighbor they chose to attack.

The strategic option for NATO is probably to mostly ignore Russian planes and drones flying near them but respond by helping Ukraine win.

(Or personally I'd like if they took out Putin but that doesn't seem the done thing. Better to kill a hundred thousand innocents than the guilty one seems to be the thing.)