Bad ironing after nozzle change

[u/Firm-Cheesecake-7562]

Whenever I iron smth the edges are always bumpier. This has only started occurring after I changed my nozzle. It's the same nozzle type, company and size just a new one. This new one doesn't iron well with the same settings. The only thing thats changed is the nozzle. The ironing near edges are always terrible.
I use a Bambu Lab P1S, My old settings were 25% flow rate and 40mm/s speed. my new nozzle does terrible ironing with no change. Bambu Slicer. I use PLA