He did not pray in congregation because he was afraid that it would delay healing of his feet

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He has polio and he does not pray in congregation sometimes
Praying in scattered groups in a workplace musalla

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Should he pray in the mosque where there are some innovations or in the prayer-room in his building?
He followed his imam in Taraweeh to pray ‘Isha’, then he followed him again for the last two rak’ahs
If he catches up with the imam when he is bowing, what should he do?
He has polio and he does not pray in congregation sometimes
Praying in scattered groups in a workplace musalla

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