updating woocommerce my meta values are restting to default

i have 2 inpuuts for length and width in product page before upadting in cart page the values picked by user is showing correctly in meta after updating it is restting to defalut values

actually there are two options in product page whole sheet and one is cut sheets on cliking on cut sheets two inputs are coming and we can input values and they gonna reflect as meta in cart page which after updating the vales of length and width showing on whole sheet is reflecting as meta even though inputted length and width values from cut sheets below are reference images like if i select cut sheets and inpuut length and 101 and width as 100 and proceed to cart page the value of 2440mm x 1220mm everytime showing as meta in every product in cart page

anybody know why this is happening or if i bypass only this even after updating that will be v helpful thanks ! [cut sheet options cart page product meta before updting woocommerce ](https://i.sstatic.net/CGus1Grk.png)

whole sheet options

after updating woocommerce meta of product in cart page should be same as before upating it !