The upcoming TSP changes (such as the elimination of the 6-month suspension of contributions, the ability to make more partial withdrawals, etc.) will take place on September 15 of this year.
Those who had to suspend contributions will be able to begin them again on that date even if six months have not passed. But the person will still have to initiate the re-start.
The bulletin mentioned this topic specifically but said that it would take place concurrently with the withdrawal and other changes scheduled to be implemented on that date per the TSP Modernization Act.https://www.tsp.gov/representative/Content/index.html
(look for Bulletin 19-3)