Active tasks name disappearing with Internationalization change

I have a Process Model that assigns a User Input Task. The process model properties and all the nodes are setup in both English(US) & English(GB) with the Primary Language in the Internationalization section of the admin console set to English(GB).

I then changed the Primary Language to English(US) and the tasks lose their name and become '???'. I went into the process instance and attempted to restart the node but this just duplicated the task with the name '???'.

Is there a way to ensure a task retains its original name or to update these tasks after the change has been made?

Thanks,

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