experimental starter made dough like clay

I took some of my starter fed it with whole wheat flour instead of my usual AP. It worked fine. Then I added about 20ml of pineapple juice from a fresh pineapple. It seemed OK except the bubbles were a lot smaller than usual, but it grew as per usual. However when I used it to make a batch of dough. The dough was very wet and I had to add a significant amount of bread flour to get the consistancy anywhere near what I would expect.  After the first proof it was very clay like yet it still rose. I shaped it and put it in a banneton. It didnt seem to have any resilliance and responded slowly to the poke test.  I baked it and it came out looking very cakelike as you can see from the picture.  I still have half of the batch..... any ideas?