Random audio problem in conversations

#### Describe the bug
When you are in a conversation, the others in the conversation have an issue with audio output from time to time. Example: I say something and a person then has a problem that they can hear but cannot understand what I am saying. It's like I'm underwater or like putting a pillow on my phone. Additionally, this problem only occurs with two people. Example: Person A is speaking and Person B hears what Person A is saying, but cannot understand it. Person C is in conversation and has no problems. In addition, this problem only occurs randomly.

#### To Reproduce
Steps to reproduce the behavior:
1. start a conversation with two or more people

#### Expected behavior
That this problem no longer occurs and I don't always have to start my sentence from the beginning.

#### Smartphone (please complete the following information):
- Device: Nokia 6.1
- OS: Android Vanilla 10

#### Additional context
- 1.1.6 - 1.1.8 F-Droid Store (I don't know if this happened with previous versions as well)
- Homeserver: matrix.org