wild magic sorcerer - tides of chaos has an issue that can make it impossible to cast a spell during battle but the steps to create it are kindof odd

step 1 cast tides of chaos before a cutsene talk
step 2 die in combat as a direct result of your talk choices i.e, pick an option that ends in combat then die without having a party wipe

step 3 talk to withers and pay to rez the character with tides
step 4 return to any combat without doing a long rest

next combat you will find that character unable to cast any spells above cantip i.e, level 1 or above spells will fail

why = tides of chaos glitches but the icon telling you tide is active doesn't show i.e, you have the effect but not the warning icon
[Linked Image from gog.com]
[Linked Image from gog.com]

note this buff resets on long rest and reload of your savegame

Luke Skywalker: I don't, I don't believe it.
Yoda: That is why you failed.