Remote Desktop and Lexware (financial office premium)

Hello, there is a problem also described by other users with the entry of numbers in certain fields of the ERP software Lexware. The following constellation: iPad (or iPhone), connection via MS Remote Desktop to a PC with Windows 11. The Lexware software runs there. There are fields, for example merchandise management / new order: date, price, there it is not possible to enter anything with the keyboard. Only copy / paste works. All other input fields are not affected. On the one hand, this is probably due to the Lexware software, on the other hand, the problem only occurs with MS Remote Desktop. With other remote software, the problem does not occur. I absolutely need a solution so that I can work sensibly with the iPad. I am at your disposal for further explanations of the problem.