I’m seeing that too on an up-to-date vivid desktop (no overlay PPA) + oxide 1.7. When I downgrade to oxide 1.6, the problem goes away. So it looks like the issue was introduced when updating to oxide 1.7. Earlier builds are not available any longer, but I was able to get packages for 1.7.3 from the phablet-team PPA, and the issue is present already.
I’m seeing that too on an up-to-date vivid desktop (no overlay PPA) + oxide 1.7. When I downgrade to oxide 1.6, the problem goes away. So it looks like the issue was introduced when updating to oxide 1.7. Earlier builds are not available any longer, but I was able to get packages for 1.7.3 from the phablet-team PPA, and the issue is present already.