TOPIC:

It's a weird behavior.
I think it should be related to the pdf files you're opening.
May you provide such a file, please?

We had similar issue in our app, Is there any progress on it?
I've uploaded example pdf where we have crash issue when zoom in after opening. Especially on older iPad devices. Please download it here - files.fm/u/7pb3ztkm.

We will test your file on our side.
In the meanwhile: which version of our SDK are you using?
To better support old devices (with less memory) I suggest you to use the "tiled" version which is memory optimized.

We're using v 3.8.7.
For example when we're opening this pdf on iPad Mini 2, after zoom in it crashes.
I'm not sure I understand, what do you mean "tiled" version?

tiled version mean CALayer version link is here:
www.radaeepdf.com/forum/roadmap-and-rele...r-calayer-3-55-beta3

it clip a page to blockes, and only render blocks in screen.
so, it can support very large zoom level, with limit memories.