Interpreter Can be Assigned Despite Overlap Time Gap

Good afternoon,

One of our interpreters has accepted an on-site interpretation session (107247), but was already assigned for another session 30 minutes after the end time of this one. Although we have selected the option to prevent assigning interpreters when there is an overlap, this appointment still allows us to assign the interpreter in question. However, the calendar view does not show this as an appointment that’s ready to assign.

Would there be a reason as to why it would allow us to assign the interpreter despite this buffer?