Unique attribute options of last Item in list are missing in Filters

[Doc2k]

Hi,

I've a problem with the attribute-fiters at the lazyList.
Typo3 version is 8.7.24-
All my attributes are of type multiSelect and I only use attribute-filters. My LazyList has no limit so every product of the allowed category is shown.

It seems that the attribute values of the last Item in a lazyList do not appear in the Filter if it's the only Item with this attribute-value.

For Example:
We have 4 Items with 2 Attributes. (Size: s, m, l, / Color: white, blue, red)

Item 1
Size: s
Color: white

Item 2
Size: m
Color: blue

Item 3
Size: l
color:blue

Item 4
Size: l
color:red

The option 'red' of 'color' will be disabled (hidden) in the filter.
The ID of the value is not included in the ajax-response of type 201701 (availableOptionsList), so it doesn't seem to be a javascript problem

If we change the order of the products to 1,2,4,3 then everything is shown in the filter ('blue' and 'l' are in use by products that are not the last item in list, so they appear).
Thanks for checking
Constantin