The auto resizer of the App SDK has received an update with version 4.6.0. Previously, the auto resizer only adjusted the height of the iframe to contain elements of that were part of the normal flow. Absolute elements were ignored. This caused issues for dropdowns, tooltips or any other absolutely positioned elements.

With version 4.6.0, you can pass a new option to the auto resizer: absoluteElements. Now, the iframe’s height will automatically increase when a dropdown is opened and would have previously overflown the app’s iframe.