Britain's Billie Jean King Cup captain Anne Keothavong said the error was something the tournament referee and organisers would have to "reflect on" and see "what could have been done better".
"If there is uncertainty, that creates anxiety," she said on BBC TV. "They [players] just need to feel reassured that the technology is working and the person who is pressing the buttons is doing the job they are meant to do.
"Hopefully we don't see mistakes like this again."
Former world number one Tracy Austin said the fault had been a "one-off".
"An interesting, dramatic situation that I'm sure we will fix in the future but it was tough to watch for those few minutes," the American added.
Men's fifth seed Taylor Fritz, who said a similar thing happened to him in Cincinnati last year, said it would be better if umpires were able to make the call if the technology failed rather than replaying the point.
When there were line judges, players could challenge the calls by using an electronic review. There are no challenges under the current system and video replays are not used.