Hmm, yes, the "being down 18 points in the polls make you more likely to win" take from the 538 classic model here:
The other two models also show (less dramatic) swings towards Jones. I'm dumbfounded at what they're seeing that's good news for him here. This is literally the worst poll for Jones so far this cycle.
But muh fundementals. When you think about it, that -18% poll is good for him because he greatly outperformed AL's PVI's last cycle, and as we know from 2018, incumbency is the end all be all.