Steps to repro

1. Open QDS in network A and configure a B2Qt device in that network
2. Close apps and move setup to network B
3. Open QDS
4. Open a project for editing

Expected result: Project opens OK

Actual result: QDS is stuck on busy indicator

From the Qt Creator's debug logs:

[12012] SOFT ASSERT [09:58:24.795]: "pid" in C:\Users\qt\work\build\qt-creator\src\plugins\remotelinux\linuxdevice.cpp:534
[12012] SOFT ASSERT [09:58:25.297]: "pid" in C:\Users\qt\work\build\qt-creator\src\plugins\remotelinux\linuxdevice.cpp:534
[12012] SOFT ASSERT [09:58:26.799]: "waitForFinished(2s)" in C:\Users\qt\work\build\qt-creator\src\libs\utils\qtcprocess.cpp:1869
[12012] qtc.remotelinux.device: Failed to get environment variables from device: "The command \"ssh://root@192.168.68.85/./env\" was canceled after 5547 ms."
[12012] SOFT ASSERT [09:58:31.846]: "pid" in C:\Users\qt\work\build\qt-creator\src\plugins\remotelinux\linuxdevice.cpp:534
[12012] SOFT ASSERT [09:58:32.349]: "pid" in C:\Users\qt\work\build\qt-creator\src\plugins\remotelinux\linuxdevice.cpp:534
[12012] SOFT ASSERT [09:58:33.849]: "waitForFinished(2s)" in C:\Users\qt\work\build\qt-creator\src\libs\utils\qtcprocess.cpp:1869
[12012] qtc.remotelinux.device: Failed to get environment variables from device: "The command \"ssh://root@192.168.68.85/./env\" was canceled after 5544 ms."
[12012] SOFT ASSERT [09:58:38.887]: "pid" in C:\Users\qt\work\build\qt-creator\src\plugins\remotelinux\linuxdevice.cpp:534
[12012] SOFT ASSERT [09:58:39.389]: "pid" in C:\Users\qt\work\build\qt-creator\src\plugins\remotelinux\linuxdevice.cpp:534
[12012] SOFT ASSERT [09:58:40.888]: "waitForFinished(2s)" in C:\Users\qt\work\build\qt-creator\src\libs\utils\qtcprocess.cpp:1869
[12012] qtc.remotelinux.device: Failed to get environment variables from device: "The command \"ssh://root@192.168.68.85/./env\" was canceled after 5536 ms."
[12012] SOFT ASSERT [09:58:45.918]: "pid" in C:\Users\qt\work\build\qt-creator\src\plugins\remotelinux\linuxdevice.cpp:534
[12012]

Only way to recover from this is to remove the created B2Qt device.