anyone suddenly lost a lot of kws in search console?

i had 1k but lost them and now it shows me only about 200. it will grow back but i believe thats bad

I don't think that's a Google dance, if you have done some off page seo lately, 90% that's a penality.

You must go and check your Google webmaster tool to see if there is any information there, and you must see if there is any type of spam links going to your site.