Redwood UI- errors in Parts/Products

We are running into several issues working with parts - pretty basic stuff that works fine in the legacy UI. Support is looking into them but we are curious is others are having similar issues. We are on 26A so Redwood Admin is not enforced yet but we are very concerned with all these issues of when it is enforce so wanted to see if others have navigated something similar

Issues:

• Part custom field had 300+ menu entries so when trying to access custom fields, we get an error (we cannot see the page at all). Support had us remove values and it corrected it in 1 environment but not the other 2. There is not cap on menu entries so this is may be sort of bug both for the initial issue and that the solution did not consistenly correct it