See attached recording. Steps to reproduce:

• Open a project
• Add modules QtQuick Controls and Qt Quick3D to get a lot of components to the Library and scrollbar visible
• Expand all sections if not already expanded
• Scroll down to the bottom of Item Library
• Type "col" to the search box
• -> Item Library lists found items correctly as expected
• Drag and drop some item, e.g. "Colum" from the Positioner group to Form Editor
• Clear search by clicking the x icon in the search field
• Again scroll down to the bottom of Item Library
• Search for "col"
• -> Found components do not come visible
• Click or scroll mouse wheel on top of Libary -> Library shows the found components