aws_core: NestedStack tags cannot override parent stack tags in constructor

[sumpfork]

Describe the bug

In this python code snippet:

app = aws_cdk.App()

stack1 = aws_cdk.Stack(app, "stack1")
tags = aws_cdk.Tags.of(stack1)
tags.add("foo", "bar")

stack2 = aws_cdk.NestedStack(stack1, "stack2")
tags = aws_cdk.Tags.of(stack2)
tags.add("foo", "zap", priority=2000)

The nested stack has tag "foo": "bar".

Expected Behavior

I expected stack2 to have tag "foo":"zap" but it has tag "foo":"bar" inherited from the parent stack. Similarly, removing a tag that was added in the parent stack does not work, but adding a new ones does.

Current Behavior

The inherited parent stack's tags cannot be modified by the nested stack.

Reproduction Steps

import aws_cdk

app = aws_cdk.App()

stack1 = aws_cdk.Stack(app, "stack1")
tags = aws_cdk.Tags.of(stack1)
tags.add("foo", "bar")

stack2 = aws_cdk.NestedStack(stack1, "stack2")
tags = aws_cdk.Tags.of(stack2)
tags.add("foo", "zap", priority=2000)

app.synth()

Observe that stack2 in the resulting cloudformation template has tag "foo":"bar".

Possible Solution

If this is expected behaviour I feel it should at least be documented (unless I missed that documentation somewhere).

Additional Information/Context

No response

CDK CLI Version

2.150.0 (build 3f93027)

Framework Version

2.149.0

Node.js Version

v20.12.1

OS

Mac os X 14.5

Language

Python

Language Version

Python 3.10.11

Other information

No response