Custom Fields: can't see all data when opening record on iPhone/iOS

ok, I tried re-importing all my passwords using MrC's converter, This time it didn't ask me to map all fields ( I don't know what I did differently, sorry), it just generated a MCS_converted.1pux file and 1PW directly imported it. When it did, it was the same: all my discrete custom fields from Bitwarden (some records have one or 2, some 5-7) get lumped all into one "Other Field" titled "Custom" and it merges them all together into one long string of characters. This is painful as i have over 2k records, and I cringe at going thru each one and teasing out all the data to make separate text fields in 1PW. Thoughts?