Unlock wallet completely -> Go to SEND tab -> in PIVX Address field open Contacts dropdown menu -> select first address to send for easiest bug reproduction (highlighter will automatically switch to type in Amount field) -> type any Amount and send transaction -> immediately after that open Contacts dropdown menu again and select that first address again (highlighter will now go to Amount field again and couple moments later it will automatically return to PIVX address field). It is annoying because if you send 2 quick transactions in a row, you will always end up typing numbers in PIVX address field.