Disable tethering hardware acceleration from developer option, hotspot will not crash.. Working fine as you can see from screenshot.. This solution was already shared in this thread..
I can't regenerate loud speaker call issue, with Vodafone-IN here in Kolkata.. I'm requesting, if possible please share logs.. I'll try to resolve this issue..
Volume control in call working fine here..
First of all, thank you so so much for this ROM, you're making a difference by helping us to stick with older devices, in this case my brother and if there's a way to contribute by means as Patreon, I'm down. Otherwise, I can actually confirm this issue on the Redmi 3S. Wild guess, but it seems to be the matter of Android 10 on older (possibly originally Android 6-based) devices, this issue is also present on the LeEco Le2 (to a stronger extent) and an ongoing issue for quite a while. I will try to document it the coming weekend. Anyhow, keep it up and once again, thanks a lot!