Sonny saves Cuz from being electrocuted in the loop no. X, but this should not be possible, since the loop begins from the short circuit Cuz makes by electrocuting himself. Therefor the loop should always start from Cuz being already electrocuted.
Ren and Hannah discover the ring of petrified grass outside the house and make the statement that the time loop is contained to only inside the perimeter of that ring
An aerial shot then shows the ring going around the house, hence the boundary of the time loops. When Sonny calls Torus for extraction, they are outside of the time loop and would be getting hundreds of calls.
At least twice in the film, a character refers to a "kuru virus." Kuru is the Papua New Guinean term for Creutzfeldt-Jakob disease (first observed in New Guinea). Kuru/CJD is caused by a prion, not a virus.
The reference to PI that is attempted when the character speaks of 3 hours, 14 minutes, and 15 seconds (3.1415) is flawed. Since there are 60 minutes in an hour and 60 seconds in a minute, the number of seconds in the time given is 11,655 and dividing by 3,600 (the number of seconds in an hour) we get 3.2375 hours instead. Although since seconds are an arbitrary way of dividing time anyway, the whole concept of a circular "time loop" having any relation to our time measurement system is a much bigger flaw.
First she says she was in interrogation 6 months, later she says 5 months.