Suction line freezes at the condensing unit at 28 degrees.
The outlet of the evaporator was 34 degrees.
Evaporator was in an attic with about a 30 foot drop.
It has two ton drive with a three ton condensing unit. Fixed restrictor.
The only thing I can figure out is the coil is over feeding and flashing close/at the condensing unit.
EXCEPT, for the obvious install a three ton drive.