v-model value is not updated correctly, when changing the value multiple times in the child component

[P4sca1]

Vue version

3.4.32

Link to minimal reproduction

https://play.vuejs.org/#eNp9U01v2zAM/SuELnWATAaWnQIn2FcPG9CtWHcUMDg27ahVJE+S3RSB/3spOU6MoM3FpsnHp8dH+cC+NA3vWmRLlrnCysaDQ982a6HlrjHWwwEsVnN4zn2xhR4qa3ZwQx03J8TdyzdDkUbtj2WeTnKBnsBCF0Y7D1LfW1NbdA5WgTqpcuVwJnQ8ITmX55B0M1itSUHoNAq5MnUiWJPbcNQZKdgcullPHFk6DEHy6cPjrlG5R/oCyKYyuw87U6JaCTZlgZSQWXpqY3N2McelTaByXROLp27qfWPCEiup8S6clm0MDZHrdRI8/d9Ki+USvG0Rgnahq1YXXhoNpXkwO/RbqetkBocg39uXIYAJP+9yRd2rSDIU0xQ45yGmXUmdK3WtL3ofweEhNL2uWVjKLgYUblrvSemylC7fKCwvrfxcKFk8UXYyS/QodAN8N+BO6YExHSiPkMNh6mMf9WXpIGCyIqFpSd6R8ZWs+aMzmlYU5xWsoM1JhfZ3E0wlUcvRCcHIF/P8M+aCd/MxX2yxeHoj/+j2ISfYPelB2yHdubHmc1ujH8q3D79wT/GpSPesVYS+UvyDdLnboHGAfW11SbInuKj2R/zbyK+/7nbvUbtxqHH5fcQLRvc0XNr3Rj/LXfDFcfc9ufivQxs4ycAF/8QXH1n/CnB8ZZs=

Steps to reproduce

Click the button Do something.

What is expected?

inProgress should be false.

What is actually happening?

inProgress is true.

System Info

No response

Any additional comments?

It works as expected until version 3.4.31. You can verify that by using the playground version switcher.

[jacekkarczmarczyk]

You need nextTick
https://github.com/vuejs/core/issues?q=is%3Aissue+defineModel+nextTick+is%3Aclosed

[P4sca1]

The behavior changed in a recent patch version, and I think the current behavior is a bug.

When I emit 2 update events during the same tick, I expect the last one to get through.