Adding different text to different pics in slides in shotcut

I have a number of pics that I need to use in a video.I want to add different text to each pic.
I arranged all the pica one after the other from playlist to time line.
But when I use text filter on the first slide a blank rectangle appears on the other slides.
If I add different text to the other slide , it appears along with the blank rectangle.
How can I solve the issue.
further when I open an audio clip in play list I am not able to add it to the audio track.
please help

The first picture is selected and has the filter. If you move the playhead to another slide, it does not change what is selected, but the filter is not active on that filter. However, the filter is still selected and showing its controls. It is a little problem but not so hard to ignore when you understand what is happening.