It's handy that keyboard and hot-key support is generally very well implemented in Octane, so user should not switch much between keyboard and mouse while adding new defects.
One thing which is really missing - possibility to expand a combobox with a standard Alt+Down hotkey (https://www.w3.org/TR/wai-aria-practices-1.1/#combobox). When user is starting typing being on a combo-field of a form - it should switch into "Type to search" mode and whatever user typed in should appear straight into filtering field. Thus user should not additionally switch to mouse and click on a drop-down icon.
E.g. Feature field: