BDR: ALTER statement hanging

Hi, I am running a three node BDR cluster. BDR version is 0.9.3. Postgres version is 9.4.5.

With 0.9.2, I used to be able to issue ALTER statements using psql and it would go through. This time it is just hanging. The statement is this:

alter table pts alter column shot drop not null;

I also tried to add a column but that hangs as well:

alter table pts add column shot_tmp text;

Thanks
-Selim