TypeScript Inference Issue with defineSlots

[Pantelakos]

Problem

When using typescript with vue's slot templates, there's a typescript error. The type of an object is specified in a slot template and typescript fails to recognize the specific type. Basically we have a child class which extends a main class which then I use the main class as the type definition inside defineSlots, but it doesn't recognize the slot type when using it in a template even though the child class is extending the main class.
The typing problem exists with defineSlots and not with defineProps.

Reproduction

Check out this project to reproduce it by just running a npm run type-check:
https://stackblitz.com/edit/vue-tsc-ts-slot-issue?file=src%2Fcomponents%2FReproProblem.vue

The VS Code IntelliSense displays this error too.

Expected

The typing should be recognized just like in defineProps.

Dependency versions

vue-tsc - 2.0.13
typescript - 5.4.5
vue - 3.4.21