Error selecting from drop-down lists in new reference fields

Since upgrading to Biblioscape 9 (my current version is 9.0.8.7) I have not been able to move down with arrow keys in a drop-down list of suggested auto-complete entries. E.g., I type in the first few letters of a journal, and a drop-down list appears of journal names fitting those first few letters. If I hit the down-arrow key, I get: "Could not convert variant of type (Null) into type (OleStr)." I had no problem selecting entries in Biblioscape 8. This also occurs for Authors and Keywords, and I believe any list of auto-complete entries. Is there any way to fix it?

We cannot make the arrow

We cannot make the arrow down key to work. In the next update, the drop down list will be in a closed state by default, if user click on the drop down list, any item can be selected.