Combobox opens when tabbing away - why?

[agos]

I have a pretty standard Combobox that looks like this:

const handleChange = useCallback(
  (id: Key | null) => {
    const account = accounts.find((c) => c.id === id);
    onChange(account ?? null);
    setTextInput(account?.code ?? "");
  },
  [accounts, onChange]
);

<ComboBox
  inputValue={textInput}
  onInputChange={setTextInput}
  onSelectionChange={handleChange}
  selectedKey={value}
>
  <Input ref={ref} />
  <Button>
    <div>
      <div>{selectedAccount?.name}</div>
      <IconChevronDown />
    </div>
  </Button>
  <ListBoxPopover options={options} />
</ComboBox>;

if I have one that has a value, tab in the input, don't type anything, and then tab away to the next form control, the Popover will very briefly open and close - quick enough to not complete the opening animation. No other combobox in the application exhibits this behavior.

If I change the handleChange callback to do nothing if the selected value has not changed the popover will still open on blur, but it will not close immediately

Why does the popover briefly open and close? Why does onSelectionChange get called on blur even if nothing changed? Is it possibly related to this discussion?

I realize this is a bit vague so I'm not expecting direct solutions, but any pointer on directions for debugging would be very welcome!

[agos]

of course, five minutes after posting this I found the solution - I was having a wonky value for textValue, and the flickering was due to the slight wait in time before setInputValue set the correct value for the input.