"Notfound" errors of CFNetwork on Apache

I have a web server that contains an ecommerce page. When I view the log of my application, CFNetwork generates many errors not found for each request addressed to one of my resources on the Web server. I think this is not an attack because the client requests a real resource on the page, but I see ~ 10 queries not found after a valid attempt.

* 10.2.2.124 – – [25/Apr/2019:23:25:38 +0100] "GET / myresource / P46 / HTTP / 2" 200 14167 "-" "Mozilla / 5.0 (iPhone; CPU iPhone OS 12_2 as Mac OS X) AppleWebKit / 605.1.15 (KHTML as Gecko) Version / 12.1 Mobile / 15E148 Safari / 604.1 "redirect-handler 4105971 4105724 0 603 200 20542 –
10.2.2.124 – – [25/Apr/2019:23:25:43 +0100] "GET / notfound / HTTP / 2" 404 16916 "-" "MobileSafari / 604.1 CFNetwork / 978.0.7 Darwin / 18.5.0" Redirect Manager 2272765 2262409 0 491 404 20538 –
10.2.2.124 – – [25/Apr/2019:23:25:45 +0100] "GET / notfound / HTTP / 2" 404 16916 "-" "MobileSafari / 604.1 CFNetwork / 978.0.7 Darwin / 18.5.0" Redirect Manager 2470971 2460384 0 388 404 20538 –
10.2.2.124 – – [25/Apr/2019:23:25:48 +0100] "GET / notfound / HTTP / 2" 404 16916 "-" "MobileSafari / 604.1 CFNetwork / 978.0.7 Darwin / 18.5.0" redirection manager 2792541 2782340 0 388 404 20938 –
10.2.2.124 – – [25/Apr/2019:23:25:51 +0100] "GET / notfound / HTTP / 2" 404 16916 "-" "MobileSafari / 604.1 CFNetwork / 978.0.7 Darwin / 18.5.0" redirection manager 2622363 2611498 0 388 404 20938 –

This occurs only when the client uses an iPhone / iPad device and the same resource is not exclusive; it could appear on any resource available on my web server.