The problem started occurring when you added an array formula to column K “Auction Provided Notes” and regenerated to create version 189 of your app.
When we read your worksheet, we need to determine which rows contain valid data. For example, in your worksheet there are 2000 rows but most of them are empty. We detect empty rows by looking at each row in the worksheet and seeing if any data field in that row contains at least one non-empty field value.
If at least one non-empty field value is present we know that the row is not empty.
Array formulas complicate this. A field with an array formula can always have a value even if the row is empty. That is the nature of array formulas.
Consequently, we ignore any column having an array formula when deciding whether a row is empty. Rows 35 through 59 of your worksheet only contain non-empty values in the array formula columns.
No other fields in those rows contains a non-empty value, so we treat rows 35 through 59 as empty rows and discard them.
You can fix the problem by ensuring that at least one field in every row in your worksheet contains a non-empty value. Again, columns that contain array formulas are ignored, so make sure the non-empty value is in some other column of the row.
I have added a new article describing this problem to make it easier for the next user who encounters this issue. See https://help.appsheet.com/troubleshooting/debugging-your-app/rows-are-missing-when-reading-your-spreadsheet