I have made a lot of animations by now, and often imported images in new layers to then animate them.
Yesterday I was suddenly unable to create blank frames from them, while I can do this on a new layer.
The result is that I can’t truly end a sequence to move to a new scene, because I will get a duplicate frame with white in it as opposed to a blank frame with 0% alpha.
A real headscratcher.
Another symptom of this is when I have an image, I often create a duplicate frame for it in the desired position, this will actually create two frames, the one in position and one in the first frame.
Normally I would then remove the frame in position 1, however, I can’t do that now.
It will instead give me a ‘white’ frame
I’m not sure if this is actually a bug, particularly because I don’t see any mention of it anywhere else.
All I can say is that this started happening after installing version 5.1.1
Here’s a short clip of what happens:
With the 5.1.1 appimage, I don’t have a problem creating a blank frame on an existing held frame or an existing keyframe or anywhere.
I do that by copy/paste of layer content between two open images or by copy/paste of an entire layer (of the same size) from one open image to another open image.
Do you mean anything different from those methods by the word ‘import’?
That has always happened and I wonder if it’s a small bug or if there’s a reason for it?
Yes, there is another way, I often import through layer–>import/export layer
Which I also did this time
I’ve just brought an image in using that method and I have no problem animating it using Create Duplicate Frame then putting blank frames on the timeline using Remove Keyframe and/or Create Blank Keyframe.
I’ve no idea why you have a problem 
Edit:Add: I’ve just tried the Windows 10, 5.1.1 installed version and have no problems with that.
I’m puzzled as well, I had the issue with a certain import and have to say that the import itself behaved in a strange manner.
The picture was in portrait and was imported into a landscape animation, when imported it added white areas at the side which I selected and removed.
Then this happened.
Strangely, I could replicate it as well on a new animation importing the exact same picture
I have since made two animations and they behaved completely normally, no portrait size imports involved though…
Could you provide a download link for that portrait aspect image, using a Direct Message to me if you prefer? If you do, what was the canvas size of the landscape aspect animation.
It does seem strange and I wonder if it happens with all portrait images imported into landscape animations.
Definitely, I’ll PM you a link
The landscape canvas size was 1920x1080 at 75 ppi
Thank you for the file, (I scaled it down to 1080 pixels in hight.)
What seems to be happening is that if you do Layer → Import/Export → Import Layer (or Import → As Paint layer) and then select the .kra file, you get an image layer with a default white pixel and that somehow messes up the ability to Remove Keyframe from frame-0 if you’ve done Duplicate Frame on frame-n.
Also, I could Create Blank Frame after that but the result was white, the default pixel.
If you Export the ,kra content as .png then Import the .png image then there is no problem. That’s an inconvenient thing to have to do.
This does seem to be a bug so I suggest that you make a formal bug report and post a link to it here.
Yes, this was my experience as well, making it impossible to make a new scene because it will all be covered in white pixels.
I’ll indeed make a bug report out of this, thanks for your help!
If you make a File Layer from the .kra file, that uses the preview .png and the default pixel is transparent, which is good.
However, you can’t animate a file layer. I wonder if if would be possible/sensible to be able to animate a File Layer?
Another possible solution would be that the Import to a layer of a .kra file should import only the preview .png image.
It would make sense that way because the import is already a merged version of the .kra, so indeed, .png conversion or taking the preview would be logical
Side track, but it would also be amazing to import a .kra as its actual layered version, that way you can always convert to a paint layer if you want to but can also choose to animate elements.
The current way of doing that is making layers invisible, then saving, then importing
I’ve just realised that you can’t animate a File Layer because the content needs to be able to change when the source .kra file content changes. 
That would be very complicated.