Genuine issue for trial presented as to disputed resignation where (1) management construed the conversation as a resignation, and employee later disputes; (2) returning military employee filed application through main system rather than the personnel agent who had handled his earlier military leave.
As SSA doesn't consider reasonable accommodation, a claim of disability doesn't judicially estop the plaintiff from claiming a right to employment during the same period.
http://media.ca8.uscourts.gov/opndir/18/08/172941P.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.