The task that is created in `cellular_pktio` on a `Cellular_Init` call is never deleted on `Cellular_Cleanup`/`_Cellular_PktioShutdown`. https://github.com/FreeRTOS/FreeRTOS-Cellular-Interface/blob/936d4f73b0e162912e3c41595a455319c495f90a/source/cellular_pktio.c#L1187