Boeing have issued a write-up of the different aspects of the datalink system that contributed to the problem observed in 737NG's FMC software version U10.8A, the problem is observed when one FMS message is in the ACARS MU queued and an ADS and a CPDLC are in the FMC queue, with the ADS message queued first. After 5 minutes of attempting to send the ADS downlink, the FMC will stop sending the ADS and then will attempt to send the CPDLC. The reset occurs when the CPDLC is finally sent with the FMC queue corrupted due to un-send ADS. the next FMC software version U11 will fix this issue.