Error while dialing dial unix /tmp/gitaly-internal<random-number>/ruby.0: connect: no such file or directory

This seams to not really break anything, but since version 13.12.5 I see these messages about every 10 seconds in the Gitaly Log:

... level=warning msg="grpc: addrConn.createTransport failed to connect to {/tmp/gitaly-internal684339864/ruby.0  <nil> 0 <nil>}. Err: connection error: desc = \"transport: Error while dialing dial unix /tmp/gitaly-internal684339864/ruby.0: connect: no such file or directory\". Reconnecting..." pid=1361 system=system
... level=warning msg="grpc: addrConn.createTransport failed to connect to {/tmp/gitaly-internal684339864/ruby.1  <nil> 0 <nil>}. Err: connection error: desc = \"transport: Error while dialing dial unix /tmp/gitaly-internal684339864/ruby.1: connect: no such file or directory\". Reconnecting..." pid=1361 system=system

The /tmp/gitaly-internal684339864/ folder only contains the internal_1361.sock= socket, no ruby.0 or ruby.1.