Avoid channel closed exception when stopping batching producer#2262

rogeralsing merged 1 commit intodevasynkron/protoactor-dotnet:devfrom

codex/fix-flaky-test-for-pubsubbatchingproducerasynkron/protoactor-dotnet:codex/fix-flaky-test-for-pubsubbatchingproducerCopy head branch name to clipboard