They should drop off, al things being equal ------ but, things are not always equal ! You do need to check that:
A) You are off of the Insolvency Register.
B) The IVA on your credit files has been marked "Completed".
C) That all of the creditors accounts have been marked defaulted. And
D) All of the default dates are on or around the date the IVA started.
You need to check with all three agencies and, for certainty, the £2 a pop statutory report is what you need to see. Also check that Notices of Corretion regarding the IVA, if any, have been removed.
Have a read here: https://www.iva.co.uk/what-does-an-iva- ... dit-record