diff --git a/micro_manager/adaptivity/global_adaptivity.py b/micro_manager/adaptivity/global_adaptivity.py
index 35be5995..88a48641 100644
--- a/micro_manager/adaptivity/global_adaptivity.py
+++ b/micro_manager/adaptivity/global_adaptivity.py
@@ -312,7 +312,8 @@ def _p2p_comm(self, assoc_active_ids: list, data: list) -> list:
         recv_reqs = []
         for global_id, recv_rank in recv_map.items():
             tag = self._create_tag(global_id, recv_rank, self._rank)
-            req = self._comm.irecv(source=recv_rank, tag=tag)
+            bufsize = 1 << 30 # allocate and use a temporary 1 MiB buffer size https://github.com/mpi4py/mpi4py/issues/389
+            req = self._comm.irecv(bufsize, source=recv_rank, tag=tag)
             recv_reqs.append(req)
 
         # Wait for all non-blocking communication to complete
diff --git a/micro_manager/config.py b/micro_manager/config.py
index 79164181..d881c09e 100644
--- a/micro_manager/config.py
+++ b/micro_manager/config.py
@@ -116,8 +116,6 @@ def read_json(self, config_filename):
                 self._adaptivity_type = "local"
             elif data["simulation_params"]["adaptivity"]["type"] == "global":
                 self._adaptivity_type = "global"
-                self._logger.warning(
-                    "Global adaptivity is still experimental. We recommend using it for small (<50 macro vertices) cases only.")
             else:
                 raise Exception("Adaptivity type can be either local or global.")