After a team takes full time-out the other team's countdown clock goes down, but it is actually properly given possession to the team that took the time-out. It is just a cosmetic bug not the engine.
On extra time, the time on the 24 seconds clock went down and the main time kept going down. It started at 8 minutes, then nothing was reported until about 5 minutes were left and the shotclock went only first time down from 24 to 0 and stayed at 0 for a long time.