WeChat Stickers: Strange problem; Cannot load stickers even when blocking is disabled in pihole

[Scintillation]

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Expected Behaviour:

Pixel 6a and Pixel 4a running Wechat cannot load stickers properly when app is open on Android 13. When Wifi is off and mobile data is on, the stickers load properly.

While on wifi, the stickers do not load, just get the spinning icon as show in this screenshot.
Setup is Opnsense > Unifi AC Lite access point, with Pihole set as DNS server.

Actual Behaviour:

Stickers in wechat fail to load. Even when I disable blocking for 5 minutes, the stickers are not loading.

AAAA sgshort.wechat.com Pixel-6a.home OK (answered by dns.google#53) NODATA (13.1ms)

AAAA sglong.wechat.com Pixel-6a.home OK (answered by dns.google#53) NODATA (82.0ms)

These two records keep being polled even though they don't have AAAA resolution for wechat.com. I switched to Google DNS from Cloudflare and still getting NODATA for sglong.wechat.com and sgshort.wechat.com.

Not sure if this is related to the problem, since on mobile data the stickers load properly.
https://tricorder.pi-hole.net/gibq8Bv3/

One thing that popped out to me was:
[✗] Failed to resolve doubleclick.com via a remote, public DNS server (2001:4860:4860::8888)

[jfb]

Use these tools:

How do I determine what domain an ad is coming from?

Block ads or fix broken sites This FAQ is written in the context of finding out how to block an ad that isn't blocked automatically, but the same steps can be used to troubleshoot issues with sites that don't function properly. An example is that sometimes certain payment gateways try to collect metrics on the sale, but these domains are blocked by Pi-hole, so the payment cannot be processed. Also, some links send you through several referrers and if one of them is blocked, you may land on a …

[Scintillation]

Thanks, it doesn't seem to be a problem with Pihole or DNS for that matter.
Even after putting in 1.1.1.1 in Opnsense settings or 8.8.8.8, neither work.

Strangely enough, the stickers load over mobile data. That's what I don't understand.

[rdwebdesign]

@Scintillation

Thanks, it doesn't seem to be a problem with Pihole or DNS for that matter.
Even after putting in 1.1.1.1 in Opnsense settings or 8.8.8.8, neither work.

This really shows the problem is not caused by Pi-hole.

Looks like this could be a problem on your router.

[Scintillation]

Thanks, I will ask on OPNsense forum.
They would be more knowledgeable about the problem.