All drop-down editors - If the native painting style is applied, the first click on the down arrow button does not open the drop-down window that was closed using the keyboard
Answers approved by DevExpress Support
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.