Modbus Driver Diagnostics Is Connected Bit

Today I noticed that the 'Is Connected' Modbus diagnostic tag stays true if you disable the driver connection in the gateway. I would think this tag should turn off under this condition - just my opinion.

Doesn't the quality go bad?

Yes, quality goes to 'Uncertain_LastKnownValue("Whatever was updating this value has stopped doing so.")'. I guess I could create another tag that is only true if Is Connected value is true and quality is 'Good'. Thanks!