Apparantly these two lines (below) in ConversationUtils.java cause null to be shown instead of username.

Line 245 and same line at 329
from = message.getToJID().getResource();

This is basically because earlier resource was stored in fromjid/tojid column of database.

But now resource is stored in fromjidresource and tojidresource columns instead of fromjid/tojid.

So above two lines always returns null and hence logs also show null.