I posted a brief specification for some artwork I wanted done, and several sellers responded. I picked some whose previous work suggested they could do what I wanted, and sent them a more complete spec. One of the sellers responded in my inbox with several messages, but Fiverr added an informational popup at the bottom of that inbox saying the seller cannot be contacted at this time. The seller is Level 2 with 200 positive reviews, and seems anxious to do the job at a price which is less than what I offered.
What does that informational popup mean? Is something shady going on?