Certainly, here are the findings from the tests and their respective solutions to prevent the issues.1
References
1Prasetyo TA, Pasaribu M, Gaol TL, et al. Development of DelTalk (an English learning application) using Agile Method. Jurnal Teknologi Informasi dan Pendidikan. 16(1):259-273. doi:10.24036/jtip.v16i1.662