Step 5: Open the animation editor, import the animation
Step 6: Move your cursor right to the end of the timeline, insert a new keyframe within the current keyframe
Step 7: Insert a new keyframe further up in the timeline, and move it towards the duplicated keyframes
Step 8: crash
I believe this is due to you being able to insert a keyframe within another keyframe for some reason right at the end of the timeline when you import it. I’ll take a look and see if I can produce a fix.