I haven't had this issue previously, until since the last reset (for the mining/nether worlds). It occurs at random intervals, usually less than an hour, and I can't seem to avoid it occurring. Additionally, while this happens, I can't connect to the ECC forums. I can connect to other websites/programs that utilize an internet connection but it seems I'm unable to connect. Any thoughts would be appreciated.
I would try shutting down your whole computer and rebooting to see if the issue is fixed. @clou44 do you know of anything else