MQTT Engine on Ignition 8.3 beta - Unable to add Namespace Server Set to Custom Namespace

Ignition Modules
2

Hi,
I checked this on Ignition 8.3.0-beta4 and Engine 5.0.0-beta2 both by adding the set directly in the custom namespace wizard and by editing the custom namespace and it appears to work ok:

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However, I know this was an issue in previous versions. Can you tell me if you did anything special to come across this?
Thanks,
Segan