I am also having the some issues.
- In Inbox when I type any message, it takes 2-3 minutes to appear in the inbox. Same with the custom offer.
- If buyer send me any image/file attachment, it takes 2-3 minutes (sometimes 5 minutes) to show in inbox.
Due to this one of my buyer ordered my gig twice and now I need to cancel the duplicate gig and refund him. This will increase the cancellation rate.