My wordpress.org website is experiencing an infinite loading loop on all browsers, and icons in my site's plugin directory are completely missing. Network issues or WordPress problems?

[robertag]

Hi guys,
For several days now, I've been experiencing two closely related behaviors, present exclusively when browsing via Kena Mobile Hotspot (connected to my Mac) on Chrome, Brave, and Safari:

1. wordpress.org enters an infinite loading loop: the page never loads, the browser idles indefinitely. Sometimes it only opens in incognito mode or after several minutes, and when it does, some quick errors appear.
2. On my WordPress-based site, the plugin icons in the WordPress backend directory don't load: sometimes they appear intermittently on the home page and disappear completely on subsequent pages, other times they aren't displayed at all.

The same behavior also occurs on Brave and Safari. The problem primarily affects the WordPress site, as I can still browse the other sites.
Before proceeding with the technical diagnosis, I attempted the following troubleshooting steps, all unsuccessful:

• Disabling AdBlock and all browser extensions
• Clearing the browser cache
• Flushing the DNS cache
• Restarting my Mac, phone, and Hotspot+
• Deleting cookies and similar
• Testing WordPress

I also checked for site- and server-side issues and can rule out any server-side issues: the WordPress server is communicating correctly with wordpress.org.
Errors detected in the Chrome console:
On two separate occasions, during the loading loop, I encountered the following errors:
GET ​https://login.wordpress.org/net::ERR_QUIC_PROTOCOL_ERROR 200 (OK)
ERR_QUIC_PROTOCOL_ERROR_QUIC_IETF_GQUIC_ERROR_MISSING
ERR_QUIC_PROTOCOL_ERROR.QUIC_TROPPI_RTOS
Additionally, a warning appears:
Some resource access requests have been restricted... (link to ChromeStatus)
Diagnostic tests performed

1. Ping test: ping api.wordpress.org

23 packets transmitted, 23 received, 0.0% packet loss.
Round-trip time min/average/max/standard deviation = 135,841/159,212/275,203/28,898 ms
Result: 0% packet loss. The server is reachable, DNS is working properly. Latency is high (average 159 ms) but not critical. This rules out a total network blockage.

2. Tested Chrome Net-Export — chrome://net-export/

I wondered if there was a way to determine if my network provider was actually blocking QUIC/UDP traffic, as I suspected QUIC/UDP traffic was being blocked. I recorded Chrome network traffic during the wordpress.org loading loop and analyzed the log via ​https://netlog-viewer.appspot.com/, QUIC section. Data collected in the session: (see screenshot ​https://imgur.com/Nce05o9). I pasted the collected data into the gemini AI ​​and it came up with a diagnosis: PMTU Blackhole on the Kena Mobile network.
The collected data indicates a specific phenomenon called PMTU Blackhole (Path MTU Discovery Blackhole), which is a problem managing the maximum packet size (MTU) on Kena Mobile routers (my provider that I use as a hotspot).
The only things that currently work are:

1. Disabling the Quick Chrome Flags protocol
2. Browsing with Cloudflare's free VPN WARP 1.1.1.1
3. Incognito mode

The problem is, I still don't understand why this problem occurs exclusively with WordPress.org, the login page of WordPress.org and the icons in the plugin directory of my website. Is this something the network provider or WordPress should fix? Thanks in advance to anyone who responds.

[Otto42]

This is a bug tracker, not a support forum.

For support for your website, go here: ​https://wordpress.org/support/forums/

[robertag]

Replying to Otto42:

This is a bug tracker, not a support forum.

For support for your website, go here: ​https://wordpress.org/support/forums/

Hi,
I was advised in the support forum to contact someone here, which is why I posted this message.
The problem seems to be related to the WordPress network, as some suggest, so I was wondering: is it possible to contact someone who handles WordPress networking?
Is there a way to report this issue directly to whoever manages the network infrastructure?