Hey there Maxim_pa98,
Thanks for reaching out to the Apple Support Communities. To get started, does this issue only occur when trying to record a voice message in WhatsApp? If unsure, try recording a voice message in the Messages app, or try recording a voice memo while you have audio playing.
Make a recording in Voice Memos on iPhone - Apple Support
Make a basic recording
1. To begin recording, tap
.
To adjust the recording level, move the microphone closer to or farther from what you’re recording.
2. Tap
to finish recording.
Send and receive messages on iPhone - Apple Support
Audio recording is an iMessage app. In a Messages conversation, tap
to show the app icons below the text field, tap
, then do one of the following:
- To record and review before sending: Tap
to record, then tap it again to stop recording. Tap
to review, then tap
to send the recording or
to cancel.
- To record a message and send it immediately: Hold
.
If the issue only persists while in WhatsApp, give the steps listed in the next resource a try that can help: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support
While we understand you may not be having issues with the app closing or not responding unexpectedly, the steps listed in the resource above can help with troubleshooting other issues you may be experiencing as well.
Keep us updated on the results, and we'll continue from there.
Have a great day!