Only Caller's Voice Recorded
I tried both on a Xiaomi Mi A2, with Android 8.1 Oreo, if i remember correctly, or even at Android 9.0 Pie, without root access (this smartphone is a familiar's one), and on mine, a OnePlus One running LineageOS 15.1 based on Android Oreo 8.1, rooted with Magisk Manager. I don't think this is a Call Recorder issue, but i find this the only good way to report it and make it know. I searched on F-Droid looking for a call recorder, to have the tool and can record the possible calls with the telecom companies, but if it doesn't record the other part, it's obviously useless, it can't be used as a proof. PD: I have a question to add, just to be satisfied my curiosity, i thought it could even record the Telegram/Nextcloud Talk calls, so i tried, but not even recorded automatically, so it's such a shame.