Anyone else experience this?
Yes. I have a wah at the front of my signal chain. I tend to copy this preset as a template, and change amps/cabs and changing delay and reverb mix settings to suit songs. I've notice the half cocked wah at certain times. Mainly experiencing it with scene changes. Now that every patch change in a song also has a scene change command so I can control overall volume. When I encounter this wah, I cycle my expression pedal to make the wah turn off (yes, it is set to auto engage). Then I go back to scene one and save the preset on the front panel. I don't know if the FAS guys would think this would help, but the way I figure it, I'm going heel down on the offending scene, so that the wah is off, and then I'm saving it in that initial setting.
If it helps, I use a LF+12 and have the global menu set to auto calibrate expressions, even though I ALWAYS plug the same pedal into the same port.
This is something new with V10. I started using scenes right away, and I am still using the same presets that I created in December, just tweaking them to be song specific.
I comb through each scene while rehearsing at home, and sometimes never have the wah phenomenon. However, this past weekend it cropped up twice in one set, and it was in the second service - it did not do it in the first service or the sound check. My gear was never turned off, so it didn't reset this way..
Just really really weird.