Adobe acrobat "fill and sign" - Not usable, massive performance problems

Hello,

we use the “Fill and Sign” function to fill out forms. There are logically fields in forms where you have to write some text, Text with more tan one sentence. There is a problem here that everyone should have:

1.) Use the Fill and Sign function and add a text field to any PDF
2.) Now copy or write text into the text field, e.g. 240 words

What's happening now?

1.) I can no longer edit the text properly, it lags like hell

2.) If you place the cursor in a certain place, it sometimes takes an extremely long time for the cursor to be placed. It works fine for the first few letters/words in the text field, but it gets worse at the end of the text field. Very strange
3.) If you open the windows task manager and simply click in the text field, you can see how the RAM requirement increases with each click. 2GB, 3GB, 4GB. Just by clicking on the text field.

Tested on 10 different PCs with Windows 10, including private computers and laptops. It affects several Adobe Reader versions. The problem seems to only affect this function in Adobe Reader. It doesn't matter what kind of PDF you use, it doesn't matter at all. The problem seems to be the function. It doesn't matter whether you use the old or new menu in Adobe Reader. Repair Function in Adobe Reader does not help.

Is there a solution or alternative to use Adobe Reader correctly for this use case?

Greetings