Enabling auto size for the content area is not working.
If one tab has a high height, and one a low height, it always sticks to the height of the high tab if going from the high tab to the low height tab.
This is default behavior, to prevent size jumping during active tab switching, tabbar always resize to biggest content.
You can check next thread for alternative solution
dhtmlx.com/docs/products/kb/inde … adjustSize