Subsequent translation job showing all fields

Hi,

Running the latest version of TM (2.1.2) on Umbraco 7.12.3

It works great!

There is a feature shown in the video where after an initial translate job, the Pending Changes shows only the field(s) edited.

However in my install, editing any field on the items results in all the text fields being listed in the Pending changes. Is this a known issue?

If so then I assume that if this can be fixed then it would also affect the Send to translate screen - i.e. only send the new/amended fields through to the translator?

Thanks, Andy