Basic AUTH continually request for log in

Using traefik 2.4.5

webserver container labeled as following:

    labels:
      traefik.enable: true
      traefik.http.routers.webserver.rule: Host(`webserver.${DOMAINNAME}`)
      traefik.http.routers.webserver.entrypoints: websecure
      traefik.http.services.webserver.loadbalancer.server.port: "${WEBSERVER_PORT:-8111}"
      traefik.http.routers.webserver.middlewares: webserver_auth
      traefik.http.middlewares.webserver_auth.basicauth.users: ${WEBSERVER_USER}:${WEBSERVER_PASS},${GUEST_USER}:${GUEST_PASS}

password hashed by bcrypt-generator (12 rounds)
checked Chrome/Edge browsers:
first logging - successfully .
then , I press on link inside the application which ask for token authorization.
the log in window pops up and re ask for user/pass.
when insert exactly same details authentication failed:


time="2021-03-17T10:31:19+02:00" level=debug msg="Authentication succeeded" middlewareType=BasicAuth middlewareName=webserver_auth@docker
time="2021-03-17T10:31:19+02:00" level=debug msg="vulcand/oxy/roundrobin/rr: begin ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":{},\"Host\":\"\",\"Path\":\"/openapi.json\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/1.1\",\"ProtoMajor\":1,\"ProtoMinor\":1,\"Header\":{\"Accept\":[\"application/json,*/*\"],\"Accept-Encoding\":[\"gzip\"],\"Accept-Language\":[\"en-US,en;q=0.9,he;q=0.8\"],\"Authorization\":[\"Basic YXZpYzpnZXRpbjEy\"],\"Cdn-Loop\":[\"cloudflare\"],\"Cf-Connecting-Ip\":[\"2a00:a040:180:2017:a094:196a:c30b:8cc6\"],\"Cf-Ipcountry\":[\"IL\"],\"Cf-Ray\":[\"6314dd404d7c405d-LHR\"],\"Cf-Request-Id\":[\"08e0e89c320000405dce22f000000001\"],\"Cf-Visitor\":[\"{\\\"scheme\\\":\\\"https\\\"}\"],\"Connection\":[\"Keep-Alive\"],\"Cookie\":[\"__cfduid=d80aacad353dd9e074cf5eefda32a39d01615022284\"],\"Referer\":[\"https://webserver.1213312378.com/docs\"],\"Sec-Ch-Ua\":[\"\\\"Google Chrome\\\";v=\\\"89\\\", \\\"Chromium\\\";v=\\\"89\\\", \\\";Not A Brand\\\";v=\\\"99\\\"\"],\"Sec-Ch-Ua-Mobile\":[\"?0\"],\"Sec-Fetch-Dest\":[\"empty\"],\"Sec-Fetch-Mode\":[\"cors\"],\"Sec-Fetch-Site\":[\"same-origin\"],\"User-Agent\":[\"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36\"],\"X-Forwarded-Host\":[\"webserver.1213312378.com\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"e44a40a10a41\"],\"X-Real-Ip\":[\"162.158.159.67\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"webserver.1213312378.com\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"162.158.159.67:47248\",\"RequestURI\":\"/openapi.json\",\"TLS\":null}"
time="2021-03-17T10:31:19+02:00" level=debug msg="vulcand/oxy/roundrobin/rr: Forwarding this request to URL" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":{},\"Host\":\"\",\"Path\":\"/openapi.json\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/1.1\",\"ProtoMajor\":1,\"ProtoMinor\":1,\"Header\":{\"Accept\":[\"application/json,*/*\"],\"Accept-Encoding\":[\"gzip\"],\"Accept-Language\":[\"en-US,en;q=0.9,he;q=0.8\"],\"Authorization\":[\"Basic YXZpYzpnZXRpbjEy\"],\"Cdn-Loop\":[\"cloudflare\"],\"Cf-Connecting-Ip\":[\"2a00:a040:180:2017:a094:196a:c30b:8cc6\"],\"Cf-Ipcountry\":[\"IL\"],\"Cf-Ray\":[\"6314dd404d7c405d-LHR\"],\"Cf-Request-Id\":[\"08e0e89c320000405dce22f000000001\"],\"Cf-Visitor\":[\"{\\\"scheme\\\":\\\"https\\\"}\"],\"Connection\":[\"Keep-Alive\"],\"Cookie\":[\"__cfduid=d80aacad353dd9e074cf5eefda32a39d01615022284\"],\"Referer\":[\"https://webserver.1213312378.com/docs\"],\"Sec-Ch-Ua\":[\"\\\"Google Chrome\\\";v=\\\"89\\\", \\\"Chromium\\\";v=\\\"89\\\", \\\";Not A Brand\\\";v=\\\"99\\\"\"],\"Sec-Ch-Ua-Mobile\":[\"?0\"],\"Sec-Fetch-Dest\":[\"empty\"],\"Sec-Fetch-Mode\":[\"cors\"],\"Sec-Fetch-Site\":[\"same-origin\"],\"User-Agent\":[\"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36\"],\"X-Forwarded-Host\":[\"webserver.1213312378.com\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"e44a40a10a41\"],\"X-Real-Ip\":[\"162.158.159.67\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"webserver.1213312378.com\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"162.158.159.67:47248\",\"RequestURI\":\"/openapi.json\",\"TLS\":null}" ForwardURL="http://172.29.0.16:8111"
time="2021-03-17T10:31:19+02:00" level=debug msg="vulcand/oxy/roundrobin/rr: completed ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":{},\"Host\":\"\",\"Path\":\"/openapi.json\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/1.1\",\"ProtoMajor\":1,\"ProtoMinor\":1,\"Header\":{\"Accept\":[\"application/json,*/*\"],\"Accept-Encoding\":[\"gzip\"],\"Accept-Language\":[\"en-US,en;q=0.9,he;q=0.8\"],\"Authorization\":[\"Basic YXZpYzpnZXRpbjEy\"],\"Cdn-Loop\":[\"cloudflare\"],\"Cf-Connecting-Ip\":[\"2a00:a040:180:2017:a094:196a:c30b:8cc6\"],\"Cf-Ipcountry\":[\"IL\"],\"Cf-Ray\":[\"6314dd404d7c405d-LHR\"],\"Cf-Request-Id\":[\"08e0e89c320000405dce22f000000001\"],\"Cf-Visitor\":[\"{\\\"scheme\\\":\\\"https\\\"}\"],\"Connection\":[\"Keep-Alive\"],\"Cookie\":[\"__cfduid=d80aacad353dd9e074cf5eefda32a39d01615022284\"],\"Referer\":[\"https://webserver.1213312378.com/docs\"],\"Sec-Ch-Ua\":[\"\\\"Google Chrome\\\";v=\\\"89\\\", \\\"Chromium\\\";v=\\\"89\\\", \\\";Not A Brand\\\";v=\\\"99\\\"\"],\"Sec-Ch-Ua-Mobile\":[\"?0\"],\"Sec-Fetch-Dest\":[\"empty\"],\"Sec-Fetch-Mode\":[\"cors\"],\"Sec-Fetch-Site\":[\"same-origin\"],\"User-Agent\":[\"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36\"],\"X-Forwarded-Host\":[\"webserver.1213312378.com\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"e44a40a10a41\"],\"X-Real-Ip\":[\"162.158.159.67\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"webserver.1213312378.com\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"162.158.159.67:47248\",\"RequestURI\":\"/openapi.json\",\"TLS\":null}"
time="2021-03-17T10:31:33+02:00" level=debug msg="Authentication failed" middlewareType=BasicAuth middlewareName=webserver_auth@docker

It seems I am getting the same issue. Were you able to solve it?