My 14 month old sleep regression

Hi! I have a breastfed almost 14 month old, and he was sleep trained at about 6 months old and was great at it until he broke his leg (😢) and had to start being rocked or fed to sleep again and cosleep. Now that he’s all better I’m sleep training him again and he’s having a hard time. I ferberize him, but give him cuddles and pep talks (inside the crib) before bed and at the check in times. it’s been 3 weeks and sometimes before bed and when he wakes in the middle of the night he still cries (loudly and angrily) is this normal? Is there something else I could be doing?