Vienna Ensemble Pro edit window won't stay open

When I click on Edit Instrument in the VSTi Rack, the VE Pro window opens for a brief second, then disappears. It’s driving me crazy. If I hold the mouse down the window stays open, but the moment I release the mouse the window disappears. It’s not hiding behind any other windows, it’s just gone.
Cubase 13, VE Pro 6.5

SOLVED: Answering my own question.

VE Pro preference was set to “Auto Raise Instance”. Uncheck that box and all behaves as it should.