BFM extend spells vanishing

[chainlink]

I have a BFM tank 30 RDD 12 Sorc 3 Paladin build that I took extend spell on primarily to get some more uses of Extended Tensers and then added a 4 level 7 spells augment to my shield to make sure I had some level 7 slots available.
What happens is I rest, I can then see the 4 level 7 slots in my quickbar but they then just vanish usually after I've run though my autocast routine (which uses no level 7 slots).
Yes !enhmode is on, yes I have enough Cha to be able to cast level 7 spells and through the added augmenter I have some level 7 slots.

[drunkenboastor]

Did you try unequipping the item then equipping it before resting? I had a similar issue recently with the vestige amni helm not giving slots on my BFM tank, removing then equipping the helm fixed it.

I am assuming that you are not swapping gear with spell slots on it while buffing.

[chainlink]

Answer to both questions is yes, I see the slots appear after resting then they just disappear for no reason I am able to pin down.