Hello, the same bevaviour here with version 0.11.1-1 from Debian Trixie.
When the panel is at the top, on the left or on the right side, the tooltips are shown near the panel like expected. Only when the panel is at the bottom, the tooltips are at the top of the screen.
When the panel is at the top, on the left or on the right side, the tooltips are shown near the panel like expected. Only when the panel is at the bottom, the tooltips are at the top of the screen.

