V-model fires off other events in Vue.js

Can anyone tell me why this is happening and how to prevent it? Any time I type into the input field it fires off the welcomeFilter() and I don’t want that happening. Super frustrating and I’m wondering why Vue does this and how to get around it.

<template>
  <div>
    <div>
		<div v-on:click="click()">Hello</div>
		<div :text-content.prop="welcome | welcomeFilter"></div>
    <form>
    <input type="text" v-model="search" placeholder="Search albome here"/>
    </form>
  </div>
  <div v-for="item in data" :key="item.id">
    
  </div>
  </div>
</template>

<script>

export default {
  name: 'App',
  data: function(){
    return {
      data: [],
      welcome: [
        'hello',
        'ala',
        'hi'
      ],
      search: ''
    }
  },
  computed: {
    filterNames: function(){
      return this.data.filter(item => {
        return item.title.match(this.search)
      })
    }
  },
  filters: {
    welcomeFilter: function(welcome){
      const random = Math.floor(Math.random() * welcome.length)
      return welcome[random]
    }
  },
  beforeMount(){
    this.fetchAPI();
  },
  methods: {
    fetchAPI(){
      fetch('http://jsonplaceholder.typicode.com/albums')
      .then(response => response.json())
      .then((results) => {
        console.log(results)
        this.data = results;
      });
    },
  }
}
</script>