ThingSpeak does not respond to API request from Android devices

ThingSpeak does not respond to API request from Android devices (Chrome or WebView) while getting private channel data. Requesting from Chrome on PC works fine.

https://thingspeak.mathworks.com/channels/2002124/field/1.json?&offset=0&api_key=XXXXXXXXXXXXXXXX&results=60

The same with requesting a chart - only round progress bar is visible and JavaScript returns "Chart data fetch failed: Error: 400"

https://thingspeak.com/channels/2002124/charts/1?api_key=XXXXXXXXXXXXXXXX&bgcolor=ffffff&color=d62020&dynamic=true&height=785&results=60&type=line&update=15&width=411

But if I share channel to everyone everything works as expected.

This happened recently.