Quote:
Originally Posted by TGS
I wonder if this depends on the format(s) of the recently opened. For example, if the first four recently opened are PDFs, but the fifth is epub, then the epub seems to open without the "Please wait" pop-up. So, maybe the device can hold up to four documents of each format in whatever this background memory is.
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Or it's because the PDF viewer app is still running, but the ePub viewer app has to start up (assuming they're different processes).