[🐞] modular-forms validation failed on Combobox if selecting the last option after having selected another option before

[syrfmy]

Which package is affected?

Headless Kit

Describe the bug

While looking at issue #1171, I found that Combobox validation also suffers from the same bug. You can look at the official Combobox validation example; if you select an initial option and then select the last option in the list.

recording.2.webm

Reproduction

https://qwikui.com/docs/headless/combobox/#validation

Steps to reproduce

• Go to the Combobox validation example.
• Select any option first.
• Then select the last option and try to submit the form. You will get a validation error as if it was empty.

System Info

Firefox

Additional Information

This issue is related to #1171 because the logic for option selection for Select and Combobox is not that much different