no, I clarified and stopped
Sorry, I misunderstood. I see you've removed the reference to "pause" in your original post.
So it's only a problem when you "stop" the scan and then Avast does not give you a status on the scan at that point, for example: "Scan cancelled,
NO THREAT FOUND" as I had posted before.
OK, I've started another scan and "Stopped" it at 20% as you suggested and this is what I got (doesn't seem to be a problem, see images). It would appear this is possibly a problem unique to you thus possibly not a "bug" as you had suggested. Have you tried it again? Is this problem you have persistent or random?
If it's a one-time type thing then could have just been a glitch that will not likely reappear.