256MB of RAM and PDFs haven't really ever mixed well.
The stock FW becoming ever so memory hungry hasn't really helped on that front either.
You'd have to downgrade by *a lot* (say, the final ~5.6.x release) to see any meaningful changes, though. The easiest solution is to restart KOReader often, or stick to ePubs.
Or reimplement all the things that would allow you to run KOReader framework-less like on FW < 5.x.
Last edited by NiLuJe; 03-25-2021 at 04:53 PM.
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