Hi, Axel.
We understand that you’ve been unable to dictate an entire sentence to Siri since before updating to iOS 14 on your iPhone SE, and we’d like to see if we can help.
Have you had a chance to try any troubleshooting? If not, let’s start there. First, make sure that you have these settings enabled. Even if they aren’t settings that you would generally use, enabling them may help us confirm or isolate the issue you’re experiencing.
- Settings > Siri & Search > Press Side/Home Button for Siri
- Settings > Siri & Search > Listen for "Hey Siri" (If this is already enabled, try disabling it and setting it up again.)
- Settings > Siri & Search > Allow Siri When Locked
- Settings > Siri & Search > Siri Responses > Always Show Speech
- Settings > Accessibility > Siri > Always Listen for "Hey Siri"
- Settings > General > Keyboard > Enable Dictation
Once you have those enabled, let's try these steps. Test by giving Siri a command between each step:
- Make sure nothing is covering your microphones. Siri uses the microphone near your front facing camera, so if you have a case or screen protector that covers that part of your iPhone, you may need to remove them for testing.
- Disable or disconnect any wired or wireless headphones or other audio devices you have connected. It’s possible the microphone is switching or trying to switch to one on a connected accessory. You might also try disabling Bluetooth to test. This will let you know if Siri is attempting to switch to a Bluetooth device.
- Restart your iPhone - Apple Support
- Try while connected to the charger.
Still getting cut off? If you're using "Hey Siri" this article may also help:
If "Hey Siri" isn't working on your iPhone or iPad - Apple Support
We appreciate you taking the time to post in the Apple Support Communities.
Warmest Regards.