Sending form data not working on Android devices?

Question

PHP

The site has a form, the data from which is sent to the telegram bot. On PC and ios, everything works fine, the form is sent, the redirect works. But if you do the same on an android device, then sending data works, but the redirect does not occur (gives an error ERR_HTTP_RESPONSE_CODE_FAILURE). Error code googled, translated, some dependency error