when enchanting items for example armors from 0 to 3 it's ok. but in pts i saw that you get extra message that it's not safe and if you enchanting +4 or more you also get new window and you can put lucky stone. here i didn't saw that.. like this crystalized few items by mistake.
i don't recall any extra warning window from the pts but hey, it has always been safe up to +3 only, what let you think it suddenly changed? oh and you crystallized few items "by mistake"? i'm sorry to hear that you were not able to notice that after the first item, it surely broke the enchant window and refused you to continue. i'm speechless.
so in short there was no option to warn that you goin oe +4 or more. and no option to use lucky stone.
maybe you're using enchant scrolls which are not appropriate for lucky stones. anyway, it would be way better if you uploaded a video on youtube where an enchant scroll and lucky stone could be seen.
used normal enchants. atm you can spam enchant button and no need press enchant. drag item. so like this you go +3. and when you go on +4 you get message or something that you can fail. and there is opportunity to use lucky stone. i didn't saw that.. and if you try oe from +3 then you get message that you can fail. that you can add lucky stone etc.