Community edition Version 4.5.0 Build 4.0.3580.14035
I didn't any customization in this area.
I think this problem could be related with that that i want to see accounts assigned to other users. In demo i can't get another user accounts at all. Even if i change my user to another under current dashlet.
In our server, where we have this problem there is possibility to get another users accounts, but when pressing next it clear all accounts grid. Probably there is no problem when Accounts are assigned to logged user.