1. Inventory Panel now support JEI's "+" integration however it doesn't detect if you actually have the items, would it be possible to integrate that too?
2. [CLOSED] Inventory Panel now supports Storage Drawers, thank you!
3. Inventory Panel does not keep the sorting preference in mind: https://youtu.be/ZCcOS7_l73c
4. Inventory Panel behaves badly when shift-clicking "+" in JEI: https://youtu.be/BGNW0Jjzmu0 (may be linked to #3421)
5. Inventory Panel will not refill some recipes, even if it has the items and they stack: https://youtu.be/XtPrxf1VsK8
6. Withdrawing a stack of items from the Inventory Panel will cause the rest of the items to disappear, being rescanned? And you will have to wait until it's finished to pick-up the next stack, making large withdraws annoying: https://youtu.be/hT8VQ13S8rY (may be linked to #3421)

Updated with 3 new issues (4, 5 and 6).

1. Are there actually multiple stacks of diamonds and obsidian available?

Yes