ES weird screenshots

[kliclick]

Hi, just starting using Recalbox. I've used the "raspi2png" method in SSH, it worked. But I've tried the screenshot utility in the web manager, and now none of the methods is working. The screenshot is "weird", like if something was wrong with frequency/resolution. I've tried with "native" instead of the default 1920x1080x60 resolution, same results. Any idea ? I join an example of screenshot.