1.4.0 generic component prop passed as slot item not typed correctly

[uino95]

After upgrading to v1.4.0 from v1.2.0 I get a typescript error on props typed as generic and then binded to slot.

Basically I have a generic component as follow

<template>
    <div v-for="item in props.items" :key="item.index" >
      <slot :item="item" name="content" />
    </div>
</template>

<script setup lang="ts" generic="T extends {index: number}">

const props = defineProps<{
  items: T[];
}>();

</script>

and then I have a page which is using this generic component as follow:

<template>
   <GenericComponentList :items="items">
      <template #content="{ item }">
          <div>{{ item.name }}</div>
      </template>
    </GenericComponentList >
</template>

<script setup lang="ts">

type ShowCaseItem = {
  name: string;
  icon: string;
  action: () => void;
  index: number;
};

const items: ShowCaseItem[] = [
  {
    name: 'Instagram Follow Up',
    action: () => {
      console.log('open IG');
    },
    icon: 'instagramIcon',
    index: 0,
  },
  {
    name: 'Email Follow Up',
    action: () => {
      console.log('open email');
    },
    icon: 'envelopeIcon',
    index: 1,
  },
]
</script>

Before upgrading to v1.4.0 from 1.2.0 everything was fine and the item binded from the genericComponent was typed correctly as ShowCaseItem. Now it is type as an object {index: number}, which is the one that I extend from. I have removed the vuecompilerOptions "experimentalRfc436": true, since it is signaled as depecrated by Volar. Nevertheless with or without that options is giving me the same error.

Is this functionality still available in 1.4.0 ? Am I doing something wrong ?