"step into" button works but it dosen't turn into where it is

[JinMaimagine]

[JinMaimagine]

when I tried “step into" in line 17,it did excute(for when I ran step over，it didn't move to next line).However,the GUI didn't change to where it was executing at.But when in line 19,it did change the GUI to that specified area and other lines it didn't

Debugger for Java version 0.58.1