elmomo

I have Toyota Matrix 2004 XRS 6 speed manual transmission. when I left my foot off the clutch I hear a hard click and the engine moves. Inside the car, the shifter moves back without poping out of gear or anything. this only happened on first gear. I replaced the mounts, and I installed shifter cable bushings. but they didn't help. The guy that I bought the car from, said he replaced the clutch. the car is parked now and I don't know what to do. The mechanic recommended changing the mounts, but they didn't help. any clues or what to do to properly troubleshoot this issue? side note: I bought the mounts off eBay, my mechanic says they are cheap mount but he doesn't think it's a mount problem. greatly appreciate your help here!!