Input updating only sometimes/erratically (after cal date chosen)

[ssuess]

I have a QDate and Qinput tied together by sharing the same v-model, and it looks like this:

 <q-input class="dinput" v-model="startdate" borderless dense stack-label label="start date" @input="showApplyButton=true;" mask="datetime">
    <template v-slot:prepend>
        <q-icon name="event" color="grey-6" class="cursor-pointer">
          <q-popup-proxy>
            <q-date minimal v-model="startdate" mask="YYYY/MM/DD" />
          </q-popup-proxy>
        </q-icon>
      </template>
    </q-input>

When I select the date on the popup, USUALLY the date displayed in the input will update as well (since they share the same v-model. But sometimes it will not update (even though the vue dev tools show that the value on which it relies HAS in fact always updated.

My v-model is using a computed vuex model that looks like this (following an example from the vuex site):

computed: {
  startdate: {
        get () {
          return date.formatDate(parseInt(this.$store.state.rstruth.data_searchdtstart), 'YYYY/MM/DD')
        },
        set (value) {
          this.$store.commit('rstruth/searchdtstart', date.formatDate(value, 'x'))
        }
      }
}

I can’t figure out why it only works most of the time. To summarise the points:

1. When selecting the date on the calendar (QDate) popup, the date always shows selected
2. Examining dev tools shows the v-model value has ALWAYS changed when new date selected
3. Input (QInput) will show the newly selected value about 80% of the time, and 20% not
4. There seems to be no pattern for why some dates will show and others not. And sometimes a date will not show when selected, but then show on some later selection of the same date.

Any ideas on how to fix or debug this? Thanks!

[ssuess]

I think I just stumbled across part of the answer, where the bug (if it is a bug) lies. If I remove themask="datetime" from the QInput, the problem goes away (except that now there is no mask on the input and bad values can possibly be entered. Is there some reason a mask can’t be on both the QDate and the QInput sharing the same v-model?