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If it is mycoplasmosis, typically infected birds develop immunity, and her eggs will be fine thereafter. You might have these defective shells for the season though, and her recovery not show in the eggs till next year.

here we are: see figure 5 (tray of eggs) on this site https://www.nadis.org.uk/disease-a-z/poultry/diseases-of-farmyard-poultry/part-1-mycoplasmosis/ and compare with what your hen is laying. You could check for other symptoms and, if you think it is this, for how to deal with it on that page too.

It could be a consequence of mycoplasma infection. I will look for a relevant photo and link and get back to you.