Cannot send to any room on Samsung Galaxy Tab S2

**Describe the bug**
The send button does not work on my Galaxy Tab S2, it just acts like nothing was pressed. This includes using the Enter key with an external keyboard. This basically makes the app unusable except to read other people's messages on this device. Seems to be specific to this device, it works fine on every other device I have. Uninstalling and reinstalling doesn't help any.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to any room on the server
2. Type in the chat box
3. Tap the send button (green arrow on the right) or hit the Enter key on a bluetooth keyboard
4. nothing happens

**Expected behavior**
Text should send to the channel when I hit Send

**Smartphone (please complete the following information):**
- Device: Samsung Galaxy Tab S2 (SM-T813)
- OS: Android 7.0

**Additional context**
- App version and store: 1.0.13 [40100132] (G-b995) Google Play Store
- Homeserver: mozilla.modular.im

Add any other context about the problem here.
I used the bug report function in the app to submit logs also. (Send button on the bug report form works fine)