Fix a bug when user get Presenter

bbb-graphql-middleware/internal/hascli/conn/reader/reader.go

@@ -48,7 +48,7 @@ func HasuraConnectionReader(hc *common.HasuraConnection, fromHasuraToBrowserChan
 				hc.Browserconn.ActiveSubscriptionsMutex.RUnlock()
 				if !ok {
 					log.Debugf("Subscription with Id %s doesn't exist anymore, skiping response.", queryId)
-					return
+					continue
 				}
 
 				//When Hasura send msg type "complete", this query is finished

bbb-graphql-middleware/internal/websrv/connhandler.go

@@ -136,16 +136,17 @@ func InvalidateSessionTokenConnections(sessionTokenToInvalidate string) {
 	for _, browserConnection := range BrowserConnections {
 		if browserConnection.SessionToken == sessionTokenToInvalidate {
 			if browserConnection.HasuraConnection != nil {
-
 				// Wait until there are no active mutations
-				for iterationCount := 0; iterationCount < 100; iterationCount++ {
+				for iterationCount := 0; iterationCount < 20; iterationCount++ {
 					activeMutationFound := false
+					browserConnection.ActiveSubscriptionsMutex.RLock()
 					for _, subscription := range browserConnection.ActiveSubscriptions {
 						if subscription.Type == common.Mutation {
 							activeMutationFound = true
 							break
 						}
 					}
+					browserConnection.ActiveSubscriptionsMutex.RUnlock()
 					if !activeMutationFound {
 						break
 					}