Yeah its periodic , comes and goes. The chugging has happened in active tabs for me, though not the redirects. When I’ve seem similar behavior on other sites and reported it they peg it to ads. The annoying bit is in chrome it seems to choke up the whole browser. To stop it you have to kill all BB tabs and start over. When I can catch it in an active tab it seems to coincide with new ads loading up every couple of minutes and getting stuck.
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