Tag Quality related question


I am using Ignition V8.1.7

I have OPC tag and OPC server is Topserver 6.0

I have configured the OPC path but that was not correct, however my OPC tag showing null value instead of TRUE/FALSE and tag Quality showing GOOD.
Hence I am little bit confused.

Is the common scenario in Ignition Version 8.1.7. Previously I was observed that if OPC tag value is null tag quality shows bad and showing quality overlays on perspective components, where the tag is linked.

Further, found that the tag used in the expression not showing bad, however showing the output status as FALSE for null value.