Dragging several clips into playlist

Recently it happened several times: Opened Shotcut and dragged 5 short video clips (mp4) together into the playlist - ended with only one clip in the playlist. Then I dragged them again, this time they were in the playlist.
Is something wrong with the program ?
Answers will be appreciated.
Shotcut version 19.12.31
OS win 10, 1809 x64

Not sure if it’s a bug, but this only happens when you first start your project.
Drag one file, then you can drag multiple files in.

This is a bug in that version that was already fixed for the next version 20.02 including the beta.