they were set to Ultra Epic category (1x in stack for each OCD level, meaning for OCD 5 max. stack was 5) for most of the last season, but apparently they were set to Legendary (only 1x OCD slot) at the season end so they got deleted
couple of other things also had changed stacks or were deleted from OCD, even if they are still on allowed list (personal shield generator, for example)
Ah ok, yeah exactly.
I added them as exception to Slot 46. Please take them out or distribute them to other slots before the end of the season so they stay in the limits.