Sounds like loan defaulted in second calendar quarter, so cure period ended 9/30/2018. Because he/she terminated, employer probably must under plan to do a loan offset (i.e., an actual) distribution of unpaid loan balance, rather than a "deemed." Participant will get 1099-R showing loan offset distribution, coded as such. If he/she rolls over that amount to an IRA by due date of tax return, then can claim rollover on 1040. That's the way the TCJA changes work.