Boy you people do get worked up about nothing.
This happens regularly in Asia, earlier this year I waited 2 hrs for a open gate at CLK during a Red TS warning 😄
Yes we shut down and re started later, as did everybody else hanging around taxiway Bravo.
CLK has had a TS warning system working well for years as has SIN.
We've had 400's and 777's taxy out in JFK and 8 hours later finally return to the Gate due to bad Snow falls.......these things happen.