I am using tag history on a tag reference and trying to figure out how it works on source path change.
I did a simple test setup with 2 memory tags and a reference tag (all integers). History is enabled on the reference tag with an "On change" sample mode.
If changing source path to a tag which value hasn't changed, no value is historised.
If changing source path to a tag which value has changed, the value is historised but also an extra 0 value which is problematic.
Are these behavior expected?