I attached 3 screenshot.
In first attachment, I connected with Secureline VPN Windows.
In second attachment, I connected with Zenmate VPN Windows.
In third attachment, I connected with Secureline VPN Android.
In all of them IP address hidden but in Avast's windows connection, seems my service provider's original DNS. It's a DNS Leak. It shouldn't be.
In Zenmate's connection, my DNS changed by Zenmate. This should be.
For complete security and privacy, all vpn companies use own DNS. Why does Avast use my internet service provider's DNS?
Beside if like you say, why does Avast change the DNS in android app in 3. screenshot?
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THE ISSUE WAS SOLVED BY AVAST SUPPORT.
THANKS!