I found one post about this problem from 2017, but the one answer did not help. My 01 Vette occasionally has the clutch sticking while sitting in traffic. It sticks to the floor and I have to stick my foot under the clutch pedal and pop it off the floor. Usually after I pop it off the floor it will work fine for a while, but sometimes will stick several times in a row. My clutch reservoir is full and the fluid is clean. I have also flushed it. Any other suggestions? Thanks.

 

Welcome to the forum.
I assume this only happens when you're stopped and not during up shifts or down shifts.

 

Yes, only when I am stopped, and not often. (so far) The only thing I can think of is the clutch master cylinder. The car sits in the garage more than it get driven, which doesn't help.