Please raise this up with Marketo Support so they can investigate further.
Not seeing issues on my instance, but it could be instance dependant.
Whenever I hit the types of issues you've explained here, the first thing that comes to mind is there could be someone else working on the same asset. I always ask around to see who else, if anybody else, is working on the same asset or have it open somewhere. Do you have multiple designers working on the same assets at the same time?
Thanks Jim and Floyd! I know that we don't have multiple designers working on a single asset. We have several people working on several assets independently of each other and we're all experiencing the same issue. We did alert Marketo Support but I wondered if this was being experienced by more people than just our team.