GRPC::Core::CallError: grpc_call_start_batch failed with outstanding read or write present (code=8)

https://sentry.gitlab.net/gitlab/gitlabcom/issues/4157110/?referrer=gitlab_plugin

GRPC::Core::CallError: grpc_call_start_batch failed with outstanding read or write present (code=8)
  lib/gitlab/gitaly_client/diff_stitcher.rb:31:in `block in each'
    yield current_diff
  lib/gitlab/gitaly_client/call.rb:45:in `yield'
    yielder.yield(value)
  lib/gitlab/gitaly_client/call.rb:45:in `block (2 levels) in instrument_stream'
    yielder.yield(value)
  lib/gitlab/gitaly_client/call.rb:42:in `loop'
    loop do
  lib/gitlab/gitaly_client/call.rb:42:in `block in instrument_stream'
    loop do
...
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