Spreadsheet custom formatting (Version 6)

Hi,
I built an application where some numbers are formatted using the ($) currency and other cell numbers use (€) symbol. The cells of spreadsheet are saved to the db using the standard interface php (and table structures).
I used the custom formatting feature of tabbar of spreadsheet with the pattern: 0.00 € for the cells with euro currency
When I save the popup formatting form, the cell is formatted fine with the right pattern but if I reload the formatting is not preserved.
Am I missing something ? If I choose other formatting patterns, reloading the page, the format is preserved.
Thanks

Hello,

We tested the issue and everything works correctly on our side.

{
  "styles": [
    [
      "wss1",
      ";;;;;;;;;;;fmt0;;;;"
    ]
  ],
  "data": [
    [
      1,
      1,
      "10",
      "wss1"
    ]
  ],
  "formats": [
    [
      "fmt0",
      "0.00 €"
    ]
  ]
}

Please, try to use serialize method before reloading the page and after it to check the data from server-side

it seems that the table “formats” is not included in the tables of the server example in php.
I will try to implement !!
Massimo