Multiple selected reference column values do not display correctly in custom forms when changed from a reference.

[admin01contoso]

When multiple values are selected from the list of references to be displayed by a condition, the selected values are displayed correctly if they are not the first value, but if the first value is removed, all are hidden.

I would like the correct value to be displayed in the custom form even when the first value is opened.

Create the following listings in SharePoint and add a title column and a YESNO column.
When the YESNO column is checked, add an Aggregate Values (calculated based on other columns) column that displays the values in the Title column.

Create a SharePoint list that references a column of aggregate values (results of a calculation based on other columns) and allows multiple selections.
If I create a custom form, select multiple values, and then uncheck the first item in the referenced list, all the selected values are shown in the view of the referenced SharePoint list, but are hidden in the custom form.
<View of Referenced List>.

<reference custom form>.

However, when an item other than the first in the list of references is released, it is displayed normally.
<View of list of references>.

<Referer's custom form>.

I would like all selected items to be displayed even when the first item A is unchecked.