Another data point: it doesn't happen with 0.17:
$ sudo mir_demo_server --vt 1 --platform-graphics-lib /usr/lib/x86_64-linux-gnu/mir/server-platform/graphics-mesa-kms.so.6
Another data point: it doesn't happen with 0.17:
$ sudo mir_demo_server --vt 1 --platform- graphics- lib /usr/lib/ x86_64- linux-gnu/ mir/server- platform/ graphics- mesa-kms. so.6