As the title says, when creating responses in background mode, they seem to never progress beyond “queued” state.
Examples:
resp_0b6bc1c8667b56270069c5ccb7ca5481969c16c55b74348558
resp_00e53595879d3d0a0069c5ccbfc80481909f56cdb11f4c10d6
resp_0cff53931923385a0069c5d99bca3c81978d1273c234b4fd41
resp_02f1e361f5065e710069c5dad1092c8195a62f94f2b6bb8d14
resp_02a7b52edff44e0b0069c5e3d74994819589a8503ac20d3e97
resp_0531a1f67eb7959b0069c5e8a1b1908196a1294d5e9638ba17