Crash on-[FXBlurView actionForLayer:forKey:] (This line is executed in main-thread)

[gathan]

Crashlytics reports a crash (frequent enough to be disturbing..)

Crashed: com.apple.main-thread
FXBlurView.m line 560
-[FXBlurView actionForLayer:forKey:]

Using Version 1.6.4
Installed via Cocoa Pods

iOS: 100% iOS 9
Device: 100% iPhone
The most times on iPhone 6s, some on 5s or 5c...

Crashed: com.apple.main-thread
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000010

0 libobjc.A.dylib
objc_msgSend + 16
1
UIKit
-[UIViewAnimationState animationForLayer:forKey:forView:] + 824
2
UIKit
-[UIViewAnimationState actionForLayer:forKey:forView:] + 80
3
UIKit
+[UIView(Animation) defaultUIViewActionForLayer:forKey:] + 120
4 UIKit
-[UIView(UIKitManual) actionForLayer:forKey:] + 124
5
Pockee
FXBlurView.m line 560
-[FXBlurView actionForLayer:forKey:]
6 QuartzCore
-[CALayer actionForKey:] + 100
7
QuartzCore
actionForKey(CALayer, CA::Transaction_, NSString_) + 96
8
QuartzCore
CA::Layer::begin_change(CA::Transaction_, unsigned int, objc_object_&) + 172
9
QuartzCore
CA::Layer::setter(unsigned int, CAValueType, void const) + 160
10
QuartzCore
-[CALayer setOpacity:] + 48
11
UIKit
+[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 620
12 UIKit