I had to contact Support to get my rollover CPEs manually credited when my cycle last renewed. I was told at the time it should have happened automatically as soon as the new cycle started, but given the current issues with the CPE portal it seems that's not the case.
https://www.isc2.org/-/media/ISC2/Certifications/CPE/CPE---Handbook-Digital-V2.ashx
"Rollover CPE
For (ISC)² members with cycles renewing/starting on or after 1 January 2015, CPE rollover credits are limited to the number of recommended annual CPEs each year for that credential, and must be earned within the last six months of the three-year certification cycle. For example, a CISSP with a cycle start date on or after 1 January 2015 may only roll over up to 40 Group A CPEs if they were earned within the final 6 months of the previous three-year certification cycle. These rollover CPEs will be eligible to satisfy the annual recommended CPEs for the first year of the next certification cycle. Note that there is no rollover provision for Group B credits."
