I don't know if this problem is because of the device or because there's a bug in the software so I'm gonna ask here first.
So yesterday I'm reading a ~8mb pdf on KOReader (page scroll = off, fit to content, landscape, other than that, its a vanilla KOReader) and treat it like when I'm reading a book (leave it for a while, skimming, etc). Suddenly, my device (or software?) is freezing. The touchscreen didn't respond to any inputs. The power button is responsive but KOReader only flashing the cover of the PDF, I've tried it many times so I'm sure that I didn't try to operate a locked Kindle.
When I put the USB cable, it shows the "connected" screen just fine, when disconnected, the screen came back to the Kindle home page, just fine. But after I touch it, the PDF cover came back and it became unresponsive again. Finally, I reboot it by holding the power button 40 sec.
I encountered that problem two times, with two different PDF files.
Any thought?
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