OPC mismatch data

i noticed from time to time Tag Browser shows the different values for the same tags (Not updated)
for example, as per below, the tag browser shows the old order while the order is updated as per opc quick client

i noticed also, the last update time stamp was in last 3 hours.

i have to enable and disable the OPC connection to be able to get the tag updated.
opc connection is OPC DA2
Ignition version 8.1.11