My selectors keep disappearing

How to?
#1

Describe the problem.
Hi folks, looking for help. Everytime i add a selector to click on the product number for the product data page (and the data looks ok), then go to the linked product data page to set up a selector, the selection disappears. I originally have 20 selected items, then i go to a product data page, then come back, and it completely forgets what was selected. Yes, i save it. It still says the .jss items i selected, but there is no selection. Any know what's going on?

Url: https://www.sigmaaldrich.com/US/en/products/chemistry-and-biochemicals/stable-isotopes?country=CA&language=en&cmsRoute=products&cmsRoute=chemistry-and-biochemicals&cmsRoute=stable-isotopes&page=1

Sitemap:
{"_id":"aldrichFeb2023","startUrl":["https://www.sigmaaldrich.com/US/en/products/chemistry-and-biochemicals/stable-isotopes?country=CA&language=en&cmsRoute=products&cmsRoute=chemistry-and-biochemicals&cmsRoute=stable-isotopes&page=1"],"selectors":[{"id":"proddata","multiple":true,"parentSelectors":["_root"],"selector":".jss1877 a","type":"SelectorLink"},{"id":"cas","multiple":false,"parentSelectors":["proddata"],"regex":"","selector":"#undefined-865-49-6-alias-link span","type":"SelectorText"}]}

#2

This website uses random numbers in its selectors so your current sitemap would soon stop working. You'll need to use more generic selectors (CSS tricks) to scrape it. E.g.

{"_id":"aldrich-test","startUrl":["https://www.sigmaaldrich.com/US/en/products/chemistry-and-biochemicals/stable-isotopes?country=CA&language=en&cmsRoute=products&cmsRoute=chemistry-and-biochemicals&cmsRoute=stable-isotopes&page=1"],"selectors":[{"id":"Product rows","multiple":true,"parentSelectors":["_root"],"selector":"div#csr > div > div > div > div:contains('Compare') > div > div:contains('Expand')","type":"SelectorElement"},{"id":"Prod number","multiple":false,"parentSelectors":["Product rows"],"selector":"div:nth-of-type(2) a","type":"SelectorLink"},{"id":"Product desc","multiple":false,"parentSelectors":["Product rows"],"regex":"","selector":"div:nth-of-type(3)","type":"SelectorText"},{"id":"Product","multiple":false,"parentSelectors":["Prod number"],"regex":"","selector":"div > h1","type":"SelectorText"},{"id":"Synonyms group","multiple":false,"parentSelectors":["Prod number"],"selector":"div.MuiContainer-root div > div > div > div.MuiGrid-root:contains('Synonym')","type":"SelectorElement"},{"id":"Synonyms","multiple":false,"parentSelectors":["Synonyms group"],"regex":"","selector":"div > div > div:contains('Synonym') span","type":"SelectorText"}]}

#3

thank you, that worked!