As long as a configurable threshold value is not exceeded, individual options are offered for selection in the column filter. If you select a very large threshold value, a scrollbar may be displayed, whereby the lower area with the buttons for applying the filter is fixed. But if the single values are long so that they wrap themselves, the scaling does not work properly. The buttons are then no longer accessible in the normal way (behavior found in TRECA, still occurs in TL7 demo, see screenshot in the appendix).
By using the tab key you can jump through all options until you reach the buttons. Since in TRECA the threshold is set very high, this is not a practical solution.
The error may have to do with the introduction of sorting at the top of the filter dialog.
Test
By default, the offset is 20 from which the filter dialog, the single values no longer offers as a selection.
For testing, it is sufficient to generate demo data with, for example, 15 children and enter long "texts" as values in the string column and then open the filter dialog and check whether the above behavior has been corrected.