Flaky test - TestRealtimePresence_EnsureChannelIsAttached

[Rosalita]

This test failed randomly in this pipeline run https://github.com/ably/ably-go/runs/6387789060?check_suite_focus=true

    realtime_presence_integration_test.go:138: 
        	Error Trace:	realtime_presence_integration_test.go:138
        	Error:      	Not equal: 
        	            	expected: []ably.ChannelState{ably.ChannelState{name:"INITIALIZED"}, ably.ChannelState{name:"ATTACHING"}, ably.ChannelState{name:"ATTACHED"}}
        	            	actual  : []ably.ChannelState{ably.ChannelState{name:"INITIALIZED"}, ably.ChannelState{name:"ATTACHING"}}
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1,5 +1,4 @@
        	            	-([]ably.ChannelState) (len=3) {
        	            	+([]ably.ChannelState) (len=2) {
        	            	  (ably.ChannelState) INITIALIZED,
        	            	- (ably.ChannelState) ATTACHING,
        	            	- (ably.ChannelState) ATTACHED
        	            	+ (ably.ChannelState) ATTACHING
        	            	 }
        	Test:       	TestRealtimePresence_EnsureChannelIsAttached
        	Messages:   	expected [INITIALIZED ATTACHING ATTACHED], got [INITIALIZED ATTACHING]

Looking at the test observability server, this looks like one of the tests that was recently turned back on

https://test-observability.herokuapp.com/repos/ably/ably-go/test_cases/2c13f7d6-af46-4b67-b4c5-3f675d06ce2c

┆Issue is synchronized with this Jira Task by Unito