Sorry for the delay, we've been troubleshooting some things and then had the holiday. Thank you dop2000 we will try your example!
I already have it set to ignore input on Platform Behavior, but I guess I could try disabling it altogether.
Your sprite 'pinning' idea is interesting -- I'd not heard that. Makes a good deal of sense though. I'll have to look into how to 'pin' but I imagine that can't be too difficult.
Thank you again for your suggestions and for taking the time to investigate and reply!