QTree with no-selection-unset option set can't accept 0 as a key

[znfgnu]

What happened?

On my website I have QTree component that shows items tree. Items are differentiated by idx field that contains integer numbers starting from 0. The QTree also has v-model:selected property set to selectedItem. Since I added no-selection-unset property to QTree, after selecting item with idx of 0 , selectedItem contains null instead. After removing no-selection-unset everything works ok.

What did you expect to happen?

With no-selection-unset: After selecting item with key 0, selected model should contain 0 instead of null.

Reproduction URL

https://codepen.io/znfgnu/pen/xxjYqbp

How to reproduce?

1. Go to reproduction link
2. Try to select option "zero"
3. Selected item below will turn to null instead of zero (other options work ok)

Flavour

Quasar CLI with Webpack (@quasar/cli | @quasar/app-webpack)

Areas

Components (quasar)

Platforms/Browsers

Firefox

Quasar info output

No response

Relevant log output

No response

Additional context

No response

[rstoenescu]

Fix will be available in Quasar v2.8.5