Clashing coupling

Hello, I’ve been driving a V50 D2, built in 2011 with around 25,000 km of mileage since a few weeks. Up to one point I’m completely satisfied with the vehicle: I’ve also noticed this well-known “crack” during gear change or load change. Here in the forum there are already some posts about it, which I have already read carefully. However, various tips were given. Adhesive the drive shafts (which is probably quite controversial), special grease up to the replacement of the clutch or even the gearbox. The posts are mostly already a bit older, so I would be interested in whether there are new experiences/solutions to this. I’m a little surprised, because the problem with Volvo is obviously already known for some years, and an almost new vehicle still has to struggle with the problem. Another small thing happened to me: If I turn the lock from position II to III to start the engine, then I can immediately go back to position II, because the starter is always busy until the engine jumps. Sometimes it comes to the starter.