” Rav Vozner never changed his position”
Torah does not work like that, if whatever he based it upon has to do with mere facts – if they change – the Halcha changes. He might have just had such of a custom/chasiddus etc. or thought its not preferable etc. but to say so ‘LeHalacha’ and leDoros you need have proof, especially that other respectable poskim and kehilos permitted…