If an Imam in Salah Taraweeh forgot to sit down for tashahud in the 2nd
rak’ah and get up straight (few seconds) but without utering AlFatiha and
then get down to perform the tashahud. What must the Imam and the makmum
do?
They should all do sujood al-sahw for this extra action, which was standing up for a third rak’ah.