1 char unplayable due to fps drop when doing anything.

My witch became unplayable yesterday. When I do anything either in a map or in town my fps drops to 1 and everything slows down towards a final inevitable disconnect :/

Neither of my other two characters are affected at all and I can play them without any issue.

Help would be appreciated as she was getting to the end of act 3 cruel and the other two are still in acts 1 & 2 normal.

Kind regards,

Nerfbob

Just realised I did not specify. This is in PoE2.

Have now tried on a different machine with exactly the same results :/