Issue 1:
java.lang.NullPointerException
1at android.graphics.Rect.<init>(Rect.java:72)
2at android.graphics.drawable.ShapeDrawable.mutate(ShapeDrawable.java:377)
3at android.widget.ImageView.applyColorMod(ImageView.java:1033)
4at android.widget.ImageView.updateDrawable(ImageView.java:611)
5at android.widget.ImageView.setImageDrawable(ImageView.java:359)
6at com.bumptech.glide.request.target.ImageViewTarget.void onLoadCleared(android.graphics.drawable.Drawable)(SourceFile:70)
7at com.bumptech.glide.request.GenericRequest.void clear()(SourceFile:312)
8at com.bumptech.glide.GenericRequestBuilder.com.bumptech.glide.request.target.Target into(com.bumptech.glide.request.target.Target)(SourceFile:603)
9at com.bumptech.glide.GenericRequestBuilder.com.bumptech.glide.request.target.Target into(android.widget.ImageView)(SourceFile:647)
10at com.bumptech.glide.BitmapRequestBuilder.com.bumptech.glide.request.target.Target into(android.widget.ImageView)(SourceFile:486)
11at com.app.Utils void loadImage(android.content.Context,ImageView,java.lang.String,size,drawable)(SourceFile:657)

happening sometimes

Issue 2:
If an ImageView has something that has its (internal) mColorMod field set to true (i.e. there is an alpha or color filter set - see ImageView.applyColorMod()), then when Glide updates the image view providing the TransitionDrawable (the current drawable + SquaringDrawable), the image view attempts to mutate it and crashes (NPE) when calling SquaringDrawable.getConstantState().

Trace from Genymotion v4.4.2

java.lang.NullPointerException
at android.graphics.drawable.LayerDrawable$LayerState.<init>(LayerDrawable.java:671)
at android.graphics.drawable.TransitionDrawable$TransitionState.<init>(TransitionDrawable.java:249)
at android.graphics.drawable.TransitionDrawable.createConstantState(TransitionDrawable.java:101)
at android.graphics.drawable.LayerDrawable.mutate(LayerDrawable.java:608)
at android.widget.ImageView.applyColorMod(ImageView.java:1216)
at android.widget.ImageView.updateDrawable(ImageView.java:716)
at android.widget.ImageView.setImageDrawable(ImageView.java:421)
at com.bumptech.glide.request.target.ImageViewTarget.setDrawable(ImageViewTarget.java:37)
at com.bumptech.glide.request.animation.DrawableCrossFadeViewAnimation.animate(DrawableCrossFadeViewAnimation.java:49)
at com.bumptech.glide.request.animation.DrawableCrossFadeViewAnimation.animate(DrawableCrossFadeViewAnimation.java:14)
at com.bumptech.glide.request.target.ImageViewTarget.onResourceReady(ImageViewTarget.java:75)
at com.bumptech.glide.request.target.GlideDrawableImageViewTarget.onResourceReady(GlideDrawableImageViewTarget.java:66)
at com.bumptech.glide.request.target.GlideDrawableImageViewTarget.onResourceReady(GlideDrawableImageViewTarget.java:12)
at com.bumptech.glide.request.GenericRequest.onResourceReady(GenericRequest.java:499)
at com.bumptech.glide.request.GenericRequest.onResourceReady(GenericRequest.java:486)
at com.bumptech.glide.load.engine.EngineJob.handleResultOnMainThread(EngineJob.java:158)
at com.bumptech.glide.load.engine.EngineJob.access$100(EngineJob.java:22)
at com.bumptech.glide.load.engine.EngineJob$MainThreadCallback.handleMessage(EngineJob.java:202)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)