PATCH on eventstream resulting in error

[peterbroadhurst]

Seeing an error on a PATCH

[2020-09-21T02:18:13.187Z]  INFO --> PATCH /eventstreams/es-8855b6c3-5941-43e8-5b46-b34c6e3059cf
[2020-09-21T02:18:13.187Z]  INFO es-8855b6c3-5941-43e8-5b46-b34c6e3059cf: Update event stream
2020/09/21 02:18:13 http: panic serving 10.10.68.2:43306: close of closed channel
goroutine 565 [running]:
net/http.(*conn).serve.func1(0xc00254b040)
	/usr/lib/go/src/net/http/server.go:1795 +0x139
panic(0x1104e60, 0x1379cc0)
	/usr/lib/go/src/runtime/panic.go:679 +0x1b2
github.com/kaleido-io/ethconnect/internal/kldevents.(*eventStream).update(0xc0009625a0, 0xc00254b220, 0x27, 0xc0009625a0, 0x0)
	/kaleido-io/ethconnect/internal/kldevents/eventstream.go:213 +0xc7
github.com/kaleido-io/ethconnect/internal/kldevents.(*subscriptionMGR).UpdateStream(0xc0004fa050, 0x13a4c00, 0xc002569640, 0xc0025ee014, 0x27, 0xc00254b220, 0x0, 0x0, 0xc0025ac6d0)
	/kaleido-io/ethconnect/internal/kldevents/submanager.go:260 +0x6e
github.com/kaleido-io/ethconnect/internal/kldcontracts.(*smartContractGW).updateStream(0xc0000fbec0, 0x13a14c0, 0xc0025b00e0, 0xc0025f0100, 0xc0025e4440, 0x1, 0x1)
	/kaleido-io/ethconnect/internal/kldcontracts/smartcontractgw.go:687 +0x3b9
github.com/kaleido-io/ethconnect/internal/kldcontracts.(*smartContractGW).withEventsAuth.func1(0x13a14c0, 0xc0025b00e0, 0xc0025f0100, 0xc0025e4440, 0x1, 0x1)
	/kaleido-io/ethconnect/internal/kldcontracts/smartcontractgw.go:101 +0x19c
github.com/julienschmidt/httprouter.(*Router).ServeHTTP(0xc0000fbc80, 0x13a14c0, 0xc0025b00e0, 0xc0025f0100)
	/go/pkg/mod/github.com/julienschmidt/httprouter@v1.3.0/router.go:387 +0xa3d
github.com/kaleido-io/ethconnect/internal/kldrest.(*RESTGateway).newAccessTokenContextHandler.func1(0x13a14c0, 0xc0025b00e0, 0xc00247df00)
	/kaleido-io/ethconnect/internal/kldrest/restgateway.go:222 +0x20c
net/http.HandlerFunc.ServeHTTP(0xc000602a00, 0x13a14c0, 0xc0025b00e0, 0xc00247df00)
	/usr/lib/go/src/net/http/server.go:2036 +0x44
net/http.serverHandler.ServeHTTP(0xc0003d4540, 0x13a14c0, 0xc0025b00e0, 0xc00247df00)
	/usr/lib/go/src/net/http/server.go:2831 +0xa4
net/http.(*conn).serve(0xc00254b040, 0x13a4c00, 0xc002569580)
	/usr/lib/go/src/net/http/server.go:1919 +0x875
created by net/http.(*Server).Serve
	/usr/lib/go/src/net/http/server.go:2957 +0x384