Retry getting initial details of subnet when waiting if we're not pas…

…sed any

changelogs/fragments/fstring-ec2_inv.yml

@@ -1,3 +1,5 @@
 # 1483 includes a fragment and links to 1513
 trivial:
 - bulk migration of ``%`` and ``.format()`` to fstrings (https://github.com/ansible-collections/amazon.aws/pull/1526).
+minor_changes:
+- ec2_vpc_subnet - retry fetching subnet details after creation if the first attempt fails (https://github.com/ansible-collections/amazon.aws/pull/1526).

plugins/modules/ec2_vpc_subnet.py

@@ -481,6 +481,10 @@ def ensure_subnet_present(conn, module):
 
     subnet = get_matching_subnet(conn, module, module.params["vpc_id"], module.params["cidr"])
     if not module.check_mode and module.params["wait"]:
+        for _rewait in range(0, 5):
+            break if subnet
+            time.sleep(2)
+            subnet = get_matching_subnet(conn, module, module.params["vpc_id"], module.params["cidr"])
         # GET calls are not monotonic for map_public_ip_on_launch and assign_ipv6_address_on_creation
         # so we only wait for those if necessary just before returning the subnet
         subnet = ensure_final_subnet(conn, module, subnet, start_time)