Multi-Variants with 5 attributes / custom labels crash

[brandiware]

Yet another issue found on the subject of multi-variants: when trying to save 90 Variants with 5 Attributes and custom labels of roughly 10 words
VM sort of crashes and shows homepage. It works when using 4 attributes.

From the notes of the VM Forum on multi-variants I remember a max of 5 attributes, is that not correct ?