[e90m3_6MT]

It happened today. I did launch from the lights and I felt the back wheels were at the limit of traction.

When I released the clutch in first gear, it stuck half way, at that time I had me foot to the floor and felt like the car was behaving normaly/accelerating.

when I put the clutch peda back to the floor to shift in second it felt very light and was quick to spring back on the release.

I did not smell anything.

Can you guys diagnose the problem? it's the first time it's happening and the car has 90,000 km.