Please help us to fix your issue.
1. At first please turn on Log recording. Go to Settings and enable Write Log feature.
Please send us latest logs files from this folder C:\Users\_your_name_\Documents\MZAP5\Log. You can open folder or current log file using Help menu.
2. Please send us your Multi Room Audio Player workspace file. The name of your current workspace you can always see in the Main window title. You can find all workspace files (and backups) here C:\Users\_your_name_\Documents\MZAP5\Workspaces
3. Please describe your system configuration. You can do it automatically with Windows dxdiag tool. Please press Win+R or start «Run» prompt in the Windows Start menu. Then type «dxdiag» and run it.
Press «Save all information…» and please send us this text file. Here you can find more information about DirectX Diagnostics tool.
4. Please record all your steps using Windows embedded Problem Steps Recorder and send us your records as a zip (default format) file. Please use this link to read about this tool.
And of course we can try to help you via Remote Desktop Software, for example Team Viewer.
Thank you for cooperation!