DNS recurrent error

Hi there !

I manage my domains on AWS and wanted to use bubble.is to develop a small but very important web app which communicates with my rest API. After developing everything in dev mode, I bought a plan to have this web app running on a custom domain with SSL on.

But here is the problem, after setting my domain to pro.winiit.com, I added to winiit.com in Route 53 (AWS routing management) a A-record with the following IP: 54.69.164.32.
Waited a few hours so the DNS propagate and it worked BUT I can’t access pro.winiit.com on every devices. Even stranger, I can access it on my mac on Chrome in normal navigation but I can’t in private navigation. Sometimes I can on my phone, sometimes I can’t. It really seems random so I decided to add a status check on AWS and here are the results (in French but still understandable) :

Asie-Pacifique (Tokyo) 54.250.253.218 mai 8, 2018 10:12:24 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
Asie-Pacifique (Tokyo) 54.248.220.26 mai 8, 2018 10:12:24 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
Asie-Pacifique (Singapour) 54.255.254.218 mai 8, 2018 10:12:19 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
Asie-Pacifique (Singapour) 54.251.31.186 mai 8, 2018 10:12:19 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
Asie-Pacifique (Sydney) 54.252.254.250 mai 8, 2018 10:12:41 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
Asie-Pacifique (Sydney) 54.252.79.154 mai 8, 2018 10:12:27 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
UE (Irlande) 54.228.16.58 mai 8, 2018 10:12:43 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
UE (Irlande) 176.34.159.218 mai 8, 2018 10:12:38 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
Amérique du Sud (São Paulo) 54.232.40.122 mai 8, 2018 10:12:38 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
Amérique du Sud (São Paulo) 177.71.207.154 mai 8, 2018 10:11:46 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Est (Virginie du Nord) 54.243.31.218 mai 8, 2018 10:11:54 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Est (Virginie du Nord) 107.23.255.58 mai 8, 2018 10:11:52 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
USA Ouest (Californie du Nord) 54.241.32.90 mai 8, 2018 10:11:24 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Ouest (Californie du Nord) 54.183.255.186 mai 8, 2018 10:11:26 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Ouest (Oregon) 54.244.52.250 mai 8, 2018 10:11:27 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Ouest (Oregon) 54.245.168.26 mai 8, 2018 10:12:50 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32

After a few minutes I retry and get other status :

Asie-Pacifique (Tokyo) 54.250.253.218 mai 8, 2018 10:16:55 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
Asie-Pacifique (Tokyo) 54.248.220.26 mai 8, 2018 10:17:32 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
Asie-Pacifique (Singapour) 54.255.254.218 mai 8, 2018 10:17:30 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
Asie-Pacifique (Singapour) 54.251.31.186 mai 8, 2018 10:16:22 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
Asie-Pacifique (Sydney) 54.252.254.250 mai 8, 2018 10:17:44 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
Asie-Pacifique (Sydney) 54.252.79.154 mai 8, 2018 10:17:31 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
UE (Irlande) 54.228.16.58 mai 8, 2018 10:16:16 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
UE (Irlande) 176.34.159.218 mai 8, 2018 10:17:17 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
Amérique du Sud (São Paulo) 54.232.40.122 mai 8, 2018 10:17:38 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
Amérique du Sud (São Paulo) 177.71.207.154 mai 8, 2018 10:17:17 UTC Failure: DNS resolution failed: Rcode NXDomain(3)
USA Est (Virginie du Nord) 54.243.31.218 mai 8, 2018 10:17:30 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Est (Virginie du Nord) 107.23.255.58 mai 8, 2018 10:17:29 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Ouest (Californie du Nord) 54.241.32.90 mai 8, 2018 10:17:27 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Ouest (Californie du Nord) 54.183.255.186 mai 8, 2018 10:17:29 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Ouest (Oregon) 54.244.52.250 mai 8, 2018 10:17:29 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32
USA Ouest (Oregon) 54.245.168.26 mai 8, 2018 10:17:22 UTC Success: HTTP Status Code 200, OK. Resolved IP: 54.69.164.32

You can see for example that one of the server in Ireland resolved the IP at first status check, then failed at the second. Note that to display a “fail to resolve”, the checker try 3 times to resolve the DNS.

Can somebody help me here ? I really can’t figure this issue as I’m more a computer guy than a network one…
Thanks !

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