Strange Behavior With Fasta File

Ugene treat this fasta file differently if we using this methods:

1. Directly open fasta file using UGENE (right click open file with ugene). Ugene will open the file and we have option to separate each reads into different track.
2. If we want to add new file from text: I copy the content of the file and then paste it. Ugene can't recognize the larger symbol ">" which marking the initial line of fasta sequence.