TMS320F2800133: Different behavior for strlen

Tool/software:

I get different out for below code while use "strlen."

    char str[] = "Hello my dear world";
    uint8_t len = strlen(str");
    
    // HERE len VALUE IS 23  ????????
    
    len = strlen("Hello my dear world");
    
    //HERE len VALUE IS 32080 ???????

But when I use for TMS320F2800157, this function works perfect ( length is 19 ) and NO issue.