Same issue with FTV; sits over night and then doesn't respond. Have to remove and reinsert to fix. (v.3.0 rc12 bootloader 2.0). Haven't run any other version as I just purchased the other day and updated to v 3.0 to use the FTV app (which works great).
I'm looking at using a Flirc with a Amazon Fire TV. It sits back on an equipment shelf without a direct IR view. Are there any issues with using a USB extension cable with the Flirc? Is there a max length?