Witch Demon Form being cancelled by spells

Demon form has started being cancelled by spells that were previously usable.

I've been using Essence drain with no problems in demon form, but it has suddenly started to cancel it. The only change that I can think of is that I used a jewellers orb to give the 3rd support slot.

Chaos bolt from my wand had been cancelling from the beginning, but figured there was different rules for weapon based spells.

And Dark Effigy also cancels demon form but unsure if this is how it's supposed to work for totem 'spells'.

Update: suddenly started working correctly but had not changed anything. Weird

ive had this on and off currently all spells break it... trying to relog and change zone until it fixes it maybe...

Ok. At The beginning you have to check 2 things. 1st check if you have checked that you char can use demon form for this spell (check it in spell disc). If you have checked it the next step you have to check if your WEAPONS add you any stats. People dont know it but when youre in demon form stats form your weapons are ignored. So if your staff gives you 10 int and you turn into demon you will not get those 10 int. And there can be a case when you dont have required int/dex/str to use this spell do onstead of locking your skill game just turn you info form that can use the spell (turn off demon form). Its not a bug its a feature.