Spark Sport is apologising to customers over poor streaming and picture quality of the cricket test between the Black Caps and Bangladesh.
The problem affected viewers who were using Chromecast to connect a streaming device to their television and prompted a string of online protests.
Broadcaster Melanie Homer tweeted: "I like my cricket watchable. This Spark Sport buffering every minute is like nails down a blackboard."
While others pointed out that their internet connections were fast enough to handle an ordinary live sports stream.