Phone going to standby while editing a shared message resets the message

#### Describe the bug
This is going to sound weird

#### To Reproduce
Steps to reproduce the behavior:
1. Open F-Droid app, share another app, select element
2. select a room
3. edit the share text, don't send
4. wait for phone to go to sleep
5. unlock phone
6. message is reset to the template as transmitted by the sharing app

#### Expected behavior
save edited state

#### Screenshots
If applicable, add screenshots to help explain your problem.

#### Smartphone (please complete the following information):
- Device: Moto G5S+
- OS: Android 10 / Resurrection Remix 8.6.4

#### Additional context
- App version and store 1.1.6 - F-Droid
- Homeserver: synapse 1.34.0