Does the intention of obtaining the reward mentioned in the Hadith become void for someone who missed the opening Takbir (Takbirat al-Ihram) in congregational prayer due to circumstances beyond their control, and is he required to repeat the forty days from the beginning?

"Whoever prays forty days in congregation, catching the first takbir, will have two immunities written for him: immunity from the Fire and immunity from hypocrisy. To attain this reward, continuity for the forty days is required. If one's attendance is interrupted, he must start anew. And persistence in catching the takbirat al-ihram in any congregation is hoped to bring about this virtue."