@metalsadman Thank you for your quick answer, but the problem was on another place. It was connected rather with Vue.js than with Quasar Framework.
Here is my problematic code (very simplified):

<div class="col-2 q-mr-md" v-for="option in editRowOptions" :key="option._id">
      <component :is="option.type" :label="option.label" :key="option._id" v-model="editedRow[option.model]"></component>
</div>

<script>
  data: () => ({
    editRowOptions: [ {type: 'QInput', _id: '50m', model: '50m_model', label: '50 m run'} ],  // dynamically loaded
    editedRow: {}
  }),

  methods: {
    editRow() {
      this.editedRow = { _id: 22 };
      // below values are filled in a loop which has dynamic content. That's why they are not set directly in row above
      this.editedRow['50m_model'] = '12:25'; 
      // ^^^^ problematic row
    } 
  }
</script>

The root problem was that attributes set later (they were not initialized in object { _id: 22 }) are missing Vue’s reactiveGetters and reactiveSetters.

Here’s my solution:

...
    editRow() {
      const _editedRow = { _id: 22 };
      _editedRow['50m_model'] = '12:25'; 
      this.editorPerson = Object.assign({}, _editorPerson);
    } 

I have the same problem with q-input. I have tried to dynamically create a set of q-inputs as @tonyskulk did. And the same result. The underlying model changes but, visually the value of q-input returns back just after focus out of the q-input.

quasar - 1.1.0
@quasar/app - 1.0.6
@quasar/extras - 1.3.1
vue - 2.6.10

Sorry for my fault. I finally found correct urls. They are on this site:

https://v0-17.quasar-framework.org/guide/quasar-playground.html

I’m was using online version of Quasar Play App (http://quasar-framework.org/quasar-play/android/index.html#/showcase), but it stops working (most probably due to switching to version 1.0.0 and redirection to quasar.dev domain)

Is there any plan to run it again? It was really very, very helpfull site.

Thank you.

Sad. Currently @kenium 's trick doesn’t work for me. It fails on error: “TypeError: Cannot read property ‘t’ of undefined”.

Here is the complete code of component:
<template>
<q-table
:title = “$t(‘default.register’)”
:data = “tableData”
:columns = “columns”
row-key = “startingNumber”
/>
</template>

<script>
export default {
data: () => ({
columns: [{
name: ‘startingNumber’,
field: ‘startingNumber’,
label: this.$i18n.t(‘startingNumber’),
}],
tableData: [{
startingNumber: 1,

}],

}),
};
</script>

<style>
</style>