virtualbox.org

Host is Dell E7440 laptop running Windows 7 SP1 Enterprise 64 bit. VirtualBox version 5.0.0 r101573. Wireless NIC is Intel Dual Band AC 7260 as a bridged adapter virtualized as Intel PRO 1000 MT desktop. Guest is "Linux Mint 17.2 Rafaela built on Ubuntu 14.04.2 LTS Trusty Tahr and kernel is 3.13.0-37-generic. The guest additions have been installed

Issue started appearing after the 5.0 update recently. After my host has returned from sleep my network connection is lost on my guest until i completely shutdown. I have tried switching the host adapter to other adapters. Disconnecting and reconnecting the cable in Devices>Network Settings. I have also tried just rebooting. The VM has to be completely powered off and back on for the adapter to work again. The network connection icon in the task bar stays discontented the entire time. No error message is given at any time.

These kinds of problems that are reproducible should be reported to bugtracker.
It would also help if you can post the ticket number here so other can see the progress, add information, or see the final results.

Created ticket 14374. Thanks.