Given that there haven't seemed to be any similar reports with GCN hardware, I suspect the tooltip issue is a Mesa r600 driver bug. E.g.
https://cgit.freedesktop.org/mesa/mesa/commit/src/gallium/drivers/r600?id=e6d7937b86d8f3c7e0605741de8721caf991af05
or something like that might explain it.
The window resizing issue is probably separate and should be tracked separately.
Given that there haven't seemed to be any similar reports with GCN hardware, I suspect the tooltip issue is a Mesa r600 driver bug. E.g.
https:/ /cgit.freedeskt op.org/ mesa/mesa/ commit/ src/gallium/ drivers/ r600?id= e6d7937b86d8f3c 7e0605741de8721 caf991af05
or something like that might explain it.
The window resizing issue is probably separate and should be tracked separately.