Omix 400 Microphone Does Not Work Properly on HelloTalk Voice Rooms

I have been using my Omix 400 phone, and for approximately two weeks, I have been experiencing an issue only when using the HelloTalk application. When I enter a voice room, play music, and chat with other users, my friends tell me that they cannot hear my voice. However, my microphone works perfectly in other applications such as WhatsApp, and this problem only occurs on HelloTalk.

Although there is no general microphone issue with my device, the fact that my voice does not reach other users through HelloTalk negatively affects both my conversations and my overall experience with the application. Therefore, I request that both Omix and HelloTalk investigate this issue together, identify any possible software compatibility problem, and resolve the malfunction. If necessary, I request assistance through a software update, application adjustments, or technical guidance to help fix the problem.