The iCar Pro is kind of an hit and miss you'll never know where it's internal electronics where sourced.I tried with Vgate iCar Pro Bluetooth v4.0 on Ioniq 2020.
On my primary phone Sony Xperia XZ2 it mostly didn't work. App couldn't recognize the car model.
On my older Sony Xperia model the app worked more often, but not always. I returned the adapter and will buy OBDLink.
For most it works as expected but some struggle to make it work correctly or up to the announced specs.
The Watchdog is particularly sensitive to the OBD2 adapter's performance as it will use intensively by constantly pulling data from the interface.
After 6 command requests failing in a row the App will shutdown the connection.
You can try to lower the frequency (through the corresponding option in the settings menu) but that will also reduce the accuracy of calculations.
Personally and if you plan to use the App intensively I would recommend only one adapter which is the OBDLink LX and the one I've been using for +6 years and +120000kms without any issues. It's fast, reliable, secure, has all the features and some you can't find in any other adapter...