Training suddenly crashes

Hey everyone,

I was training a Image Classification Model with tensorflow. My training worked great until Epoch 34 where it suddenly dropped. Does anyone know what could be the reason for it?

https://preview.redd.it/agzfsce5m2w81.png?width=895&format=png&auto=webp&s=74256796e6eb619142ec4407967985816191f8c9

https://preview.redd.it/heuazfn9n2w81.png?width=427&format=png&auto=webp&s=00092a3fdcced0ae57b4d7b1d5db884f1c55f72f