Problems with ipcacheParse in Squid Proxy

[denmmx]

Hi,
I have OPNsense 16.1.14-amd64 configured with Squid proxy (latest release - 3.5.19) and constantly views records in cache.log such as:

Code Select Expand

2016/05/19 10:57:41 kid1| ipcacheParse: No Address records in response to 'iphone-ld.apple.com'
2016/05/19 10:50:16 kid1| ipcacheParse: No Address records in response to 'sn3301.storage.live.com'
2016/05/19 10:50:16 kid1| ipcacheParse: No Address records in response to 'sn3301.storage.live.com'
2016/05/19 10:49:28 kid1| ipcacheParse: No Address records in response to 'update.fr1.drweb.com'
2016/05/19 10:49:28 kid1| ipcacheParse: No Address records in response to 'update.fr1.drweb.com'
2016/05/19 10:48:47 kid1| ipcacheParse: No Address records in response to 'update.kz.drweb.com'
2016/05/19 10:43:19 kid1| ipcacheParse: No Address records in response to 'secure-ams.adnxs.com'

DNS entries in log not related between themselves. Mainly all works well, but what is the reason of these records? Maybe something configured wrong (e.g. DNS service)?