The drone ship uses a satellite link to send footage back. The turbulence from the exhaust rocks it enough that it loses it's connection. It dies on pretty much every drone ship landing.

... and why am I not surprised... someone has made an entire video about this laugh2
https://www.youtube.com/watch?v=hH75bVG7HBo

Here's a land-landing with pretty good footage. https://youtu.be/SlgrxVuP5jk?t=1255

If you ever find yourself in a fair fight, your tactics suck.