The 1.1.1.1 Android app (v2.0.8) is failing to connect to the captive portal checker over wifi (the connection is successful over cellular). Because the app wrongly detects that there is a captive portal, it does not send DNS requests to 1.1.1.1.
2019-07-02T03:13:20.166 | [CaptivePortalDetector] Captive Portal Retry
2019-07-02T03:13:20.167 | [CaptivePortalDetector] Checking Captive Portal With HTTPS...
2019-07-02T03:13:20.216 | [CaptivePortalDetector] Execute Request | url = https://cp.Cloudflare.com, exception = javax.net.ssl.SSLHandshakeException: Domain specific configurations require that hostname aware checkServerTrusted(X509Certificate[], String, String) is used
2019-07-02T03:13:20.217 | [CaptivePortalDetector] Captive portal not resolved
2019-07-02T03:13:20.218 | [CaptivePortalDetector] Result: isCaptivePortal = true