I had the same problem during January and February. I do Translation. I went from 3-4K monthly to 1K. After doing some tweaks in my account regarding SEO, I regained my regular income for one month, but I went down to 1K again this month. I am using promoted gigs and sending coupons to my clients so they come back. I think this is happening to several sellers, and also, @genesisbio is correct about what is happening now globally.
I hope you can recover your regular income. Best of luck!
A.