Avoiding IK-TCP protocol registration failures in Akka

Question

Sometimes I get the following messages when the application starts. When I do this, the application does not initialize.

Unhandled: DeadLetter(
  Register(Actor[akka://myapp/user/StreamSupervisor-0/$$7#141722842],true,false),
  Actor[akka://myapp/user/StreamSupervisor-0/$$7#141722842],
  Actor[akka://myapp/system/IO-TCP/selectors/$a/59#87610191]
)

From this old inkjet stream , I would suggest that the Akka system did not accept TCP listener registration messages from Akka HTTP.

The error does not always occur when the application starts up, making me think of a time problem.

I use

"com.typesafe.akka" %% "akka-http" % "10.0.9",
"com.typesafe.akka" %% "akka-cluster" % "2.5.11",
"com.typesafe.akka" %% "akka-cluster-tools" % "2.5.11",
"com.lightbend.akka" %% "akka-stream-alpakka-amqp" % "0.17",

What is really going on, and how can I prevent it?