Use whoever you feel is best placed to know you well, and can comment meaningfully on the questions asked in the rec. If this is the people who have just been transferred, then that is the people you should use.
There is no requirement or even advantage to using your current supervisor. The only issue with the recency of recommendations is that recommenders obviously can only comment on you as they know you, and using older recommenders may mean the recs do not reflect your more recent development. This may be of more significance issue if they last knew you 1 or 2 years ago, but is unlikely to be a major factor if it is only a few months.
Ultimately, adcom are judging the rec based on its CONTENT, not on the timeframe in which the recommenders know/knew you.