I had the same problem with the standard arbor 9/10 (same mechanisms). Believe its the spool click pin hanging up. My problem occurred after having fished one night, left the stuff in the car(didn't rinse after use),then fished in the morning. I took the reel apart per the instructions, cleaned and lubed. The click pin will get gummed up with oxide/rust so you want to clean that up real good. Then apply a bit of lithium grease to to the click pin and click spring. I have not had a problem since. But, if I thought I was going to get into tunoids or something I'd just remove the pin all together to be safe.