aws-cdk-lib: Missing tags when cfn is synthesized from the app

[xavi-bean]

Describe the bug

When adding stack tags using Tags.of(stackname).add("key", "value") it works great until CDK version 2.87. However, when synthesizing the stacks using cdk versions >=2.88 (latest version 2.94 also tested and failing) the tags disappear from the stacks.

Expected Behavior

Tags should apply to all child constructs once the stack is synthesized, the same way it has been doing until aws-cdk-lib version <=2.87.

Current Behavior

Tags are not generated when the stacks are built.

Reproduction Steps

I apply tags at stack entry point level through app.py, the same way showed in the documentation Tags.of(stackname).add("key", "value") (this has been working until v.2.87).

Possible Solution

No response

Additional Information/Context

This is similar (or the same) bug that was reported in past: #26169. Apparently this was fixed in cdk v. 2.87 (it appears in its changelog) but seems broke again in versions >=2.88.
Have opened a case to aws support and they have said me to open this issue in order to be able to publicly track its fixing status.

CDK CLI Version

2.94

Framework Version

No response

Node.js Version

20.3.0

OS

Linux / macOS

Language

Python

Language Version

No response

Other information

No response

[peterwoodworth]

There was a similar issue reported here - It seems to me that the issue starts appearing on 2.81.0 using the code in that issue. Could you please provide a reproduction snippet if it's 2.88.0 where you start seeing the issue?

[github-actions]

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