Tablerates CSV not uploaded/picked up

[Asitis]

This issue is similar to this one, but it doesn't conflict with the default Table Rates, but it doesn't allow to configure the DPD table rates.

Steps to reproduce:

• Have Magento default Table Rates enabled and set up
• Go to the admin of Magento 2.3.3
• Go to the Shipping Methods
• For DPD Pickup, make sure you use the Rate Type "Table Rates" and upload a CSV file
  Also enable default Magento's Table Rates and upload a CSV file there as well (I tested this with Price vs Destination, to be free for orders above 50,- and 10,- for orders below that)
• Go to the frontend and add any product < 50 to the cart
• Go to the checkout and check the available shipping methods

Expected result: The DPD Pickup option cost would be 10,-
Actual result: The DPD Pickup option is shown, along with the default Magento table rates, but it is free.

When I go back to check the CSV in the backend, it doesn't update. I export the empty CSV, add my rules to it, save it, upload it. When I download it again I just get a empty CSV again.
There are no errors (file permissions or the like) from Magento or the server.

This is the CSV content I try to use;
Country,Region/State,"Zip/Postal Code","Order Subtotal (and above)","Shipping Price"
*,*,*,0,10
*,*,*,50,0

[Asitis]

Found the issue, fixed it ourselves;
Has to do with the dpd_shipping_tablerate table properties. condition_name is set to varchar(20) but it is supposed to be package_value_with_discount (which has 27 characters), so we set the table to varchar(30) and now it does save.