MPI issues on SuperMUC - Running out of MPI tags ?

I have some issues on Super-MUC with some MPI communications.

I run

mpirun -np 64 ./swift_fixdt_mpi -r 100 -t 16 -f ./uniformBox1024.hdf5 -m 0.02 -w 5000 -d 1e-8

and get the following error in the domain decomposition:

[027] task.c:task_lock():104: Failed to test request on send/recv task (tag=12565, Message truncated, error stack:
PMPI_Test(184)....................: MPI_Test(request=0x2ac946c8b898, flag=0x2ac7fc783458, status=0x2ac7fc783444) failed
MPIR_Test_impl(67)................:
MPIDI_CH3U_Receive_data_found(131): Message from rank 26 and tag 12565 truncated; 23040 bytes received but buffer size is 19200).
application called MPI_Abort(MPI_COMM_WORLD, -1) - process 27
[013] scheduler.c:scheduler_enqueue():1057: Failed to emit irecv for particle data (Message truncated, error stack:
MPI_Irecv(165)......................: MPI_Irecv(buf=0x2aeabeebf340, count=19200, MPI_BYTE, src=7, tag=3829, MPI_COMM_WORLD, request=0x2aebf9fdb878) failed
MPIDI_CH3U_Request_unpack_uebuf(638): Message truncated; 23040 bytes received but buffer size is 19200).
application called MPI_Abort(MPI_COMM_WORLD, -1) - process 13