Just came back from my weekend trip to France, and while getting a miss-shift into neutral instead of first gear I noticed the following oddity: while at speed I can't seems to shift into either first gear or second gear from neutral unless I slow down enough to sync rpm. Even with the clutch lever completely pressed, shifting into first or second gear from neutral produces a continuous loud rattling sound, and if I release the clutch lever it tends to drops back into neutral.
Any ideas what the cause of this can be? Every other way of shifting all works fine. From neutral into first at standstill works fine as well.