Issues with setting focus on Input in Popup-Proxy

[AdagioB]

I have a component like below.

This component is visible, when a Select component (in different component) is showing it's dropdown menu. It can give a few more options for filtering items (in this case it is only a simple search by keyword). When the filter is shown, the user can click in the Input field and start writing, which filters the items in open dropdown menu, without the menu closing

In the watch area, I tried to set focus on the Input field, when it show is true, but nothing happens. I would to have the users be able to just start writing in the Input field, when the dropdown is shown. I know there is some filter options in the Select field, but as we needed more filter options, we decided to skip using that

Any idea on why focus is not set? There's no error or anything, so I don't have much to go by

<template>
    <q-popup-proxy :value="show"
                   transition-show="none"
                   transition-hide="none"
                   @input="KeepAlive"
                   :offset="Offset">

        <q-card class="my-card"
                bordered>

            <q-card-section class="q-pt-m FilterBackground2">
                <div class="row">
                    <q-input class="col-9"
                             outlined
                             dense
                             ref="input"
                             bg-color="red-1"
                             v-model="nameInput"
                             placeholder="Indtast søgeord">
                    </q-input>
                </div>
            </q-card-section>                        
        </q-card>
    </q-popup-proxy>
</template>

<script>

    module.exports = {
        name: 'Filter_Status_Options_HeatPump',

        watch:
        {
            show: function (newVal)
            {
                if (newVal === true)
                {
                    let refs = this.$refs;

                    Vue.nextTick(function ()
                    {
                        refs.input.focus();
                    })

                
                }
            }
        },
        components:
        {

        },
        props:
        {
            show:
            {
                type: Boolean,
                required: true
            },
        },
computed:
        {
            Offset()
            {
                // https://codepen.io/sethdavis512/pen/EvNKWw

                if (this.windowWidth === 0)
                    this.windowWidth = window.innerWidth;

                return [-(this.windowWidth / 2), -220];
            }
        },
data()
        {
            return {
                nameInput: '',
                windowWidth: 0
            };
        },
methods:
        {
            //
            // For some reason this empty method called from popup proxy will keep the popup open
            //
            KeepAlive()
            {

            },
}
    }
</script>