That looks nothing like Sleepdoc's amber, which was orange colored. I think the structure was different too, less rag. Your taste description, while sounding very much like a fruit I would absolutely love, is not close to what we experienced here, sweet and earthly with the smallest hint of some spice like anise or licorice. Your flavor description does sound like Sleepdoc's Berry. Are the leaves long and pointed, sort of like a mango? Maybe a seedling mix-up. But I have personally planted seedlings and the fruit end up nothing like the parent. I am starting to think people searching for seeds of a particular parentage would do just as well planting seeds of any good jackfruit they encounter since the genetics do not seem to carry forward.
If you want to reduce the acidity, try waiting a day after the fruit is soft on the tree and see if the acidity goes down. This is a hard theory to prove but I think acidity may be reduced by leaving the fruit on the tree longer. This seems to be the case with Bangkok Lemon.
