We have the same problem with our 2015 Jayflight 23rb. You might want to do a search on this forum for "wobbly table". There are quite a few of us with the same problem.
I wonder if anyone has presented this problem to Jayco and what/if they responded. Also wonder if they've modified their design as our table extends into the window area and you can't easily put the blind down. Personally I think they need to go back to the metal cups for the legs instead of the plastic ones they now use.
This is what I did to fix mine. Old folding chair leg, hammered the two ends flat, drilled holes and attached it to the window frame and bottom of table. doesn't move at all and is not in the way.
Oour table met up right against the wall. I took a piece of wood and mounted it to the wall with just a little bit of pressure on the bottom of the table and it works like a deck ledger to support that side of the table. It takes about 90 % of the wobble out and is only 3/4" thick. We rarely use the table area as a bed, so it is never seen.