redirect error

issue is happening totally randomly, when some user go to domain, some strange redirect happens for them, page is getting redirected to, BUT for the same user, in different browser website can work as expected…
Cant understand where the issue is and h to fix this :frowning:

From response headers I see “location: http : //” comes from unknown place… can someone point in the right direction?

Here’s response headers when you try to open website by going to domain:

HTTP/2 302 Found
date: Fri, 19 Feb 2021 19:23:41 GMT
content-type: text/html; charset=UTF-8
x-powered-by: PHP/7.4.14
vary: Accept,Host,Accept-Encoding
cache-control: max-age=0
expires: Fri, 19 Feb 2021 19:23:41 GMT
strict-transport-security: max-age=31536000;
cf-cache-status: DYNAMIC
cf-request-id: 085d58884f0000166960124000000001
expect-ct: max-age=604800, report-uri=“cloudflare…/cdn-cgi/beacon/expect-ct”
report-to: {“max_age”:604800,“group”:“cf-nel”,“endpoints”:[{“url”:“cloudflare endpoint url was here”}]}
nel: {“report_to”:“cf-nel”,“max_age”:604800}
server: cloudflare
cf-ray: 62425d207adf1669-ARN
X-Firefox-Spdy: h2