Low microphone volume on Acrobits or voip.ms softphone app when using Apple Carplay?

Hello,

Is anyone experiencing low microphone volume using the voip.ms iOS softphone app over Apple Carplay? My callers tell me that my voice sounds very quiet when speaking from the car using my iPhone connected via Carplay. The volume is normal for regular phone calls over Carplay (with the same car and same phone).

More specifically, I’m using the Acrobits Softphone version of the app which was white-labeled by voip.ms for their app. So it’s essentially the same app but the Acrobits version offers more options (like call encryption) so I prefer using it over the voip.ms white-labeled version.

Thanks!