This happened twice last night. I was was searching for a match in Trials, I would find a match and before leaving Orbit I would immediately get a network disconnect error and then get a locked out from queuing. I don't think this is an actual network issue as I have no problem playing any other content in D2. After this happened a second time last night, it appears I'm still locked out from Trials.
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Hey there, Thank you for reporting. We're actively tracking this general networking error. Your disconnect was reported the moment it occurred. If you continue to receive this error, please consider following the suggestions in our Network Troubleshooting Guide. https://help.bungie.net/hc/en-us/articles/360049496531-Network-Troubleshooting-Guide