[Android] Custom Emotes with specific names don't work

On a Server, we got custom emotes with the same names like original emotes but with an uppercase letter (like :Thumbsup: :Laughing:) On PC, you can easily type this in the chat and the emotes will load. Also when you click them from the emote menu, they will load. But on Android (idk about iOs), the emotes doesnt show up when writing in the text field. And if you want to send the emote via the emote menu, it doesnt work because it puts it into the textfield with the :: and so it has the same effect, the custom emote cannot be posted on Android.