Dictaphone doesn't work on iPad Air 3 (iPadOS 14.3)

When compiling the Dictaphone sample, uploading to an external server und running on an iPad (Air 3, iPadOS 14.3) it shows the error messages (see screenshot) in MacOS Safari console after giving permission to access the microphone. (latest TMS Web Core 1.6 for Delphi).

Possibly iOS 14.3 broke this.
We find references here:

Does it help specifying WebMediaCapture.Capture = mctBoth
We will further investigate.

Quick test: unfortunately it didn't help. Now the app is requesting both camera and microphone access, but (after giving both permissions) the result is the same, i.e. the same error at the same sourcecode line.