Problem with touch events - Event down received but no event up after that

Hello,

I'm working with a custom board with S7G2 microcontroller and a touchscreen (SSP 1.2.0).

I have the configuration working but I have a problem with one area in the touch screen. When I touch the white area in the following image the touch events present no problem (I receive a SF_TOUCH_PANEL_EVENT_DOWN and after that, a SF_TOUCH_PANEL_EVENT_UP). But in the red area there's only SF_TOUCH_PANEL_EVENT_DOWN event.

Here's the touch configuration (the configuration I don't show is the predefined configuration):

I've tried changing touch coordinate rotation angle to 0 but the result is the same.

I've also tried changing the Hsize Pixels and the Vsize Pixels value, but in that case the event received for the red area was SF_TOUCH_PANEL_EVENT_INVALID.

Any idea about what's going on?

isaenz.