Tabindex not working for multiselect fields in extjs 4

Hello All,

I have some 10 - 15 fields in my form and the tabindex works fine for all the fields except for the multiselect fields. When I am trying to tab to the multiselect field from the previous field, the control never goes to the multi-select field. This is happening in IE with extjs 4.2 version. I saw something which says there is a fix for this extjs 5. But is there any workaround for this to work in extjs 4 version.

Thanks,

Tabindex not working for multiselect fields in extjs 4