When copying text between InDesign documents, the Word order changes

I have a textlbox with this content:

 "22. DEZ - 03. JAN Weihnachtsferien Ende"

I copy this block of text to the clipboard. Then I switch to another InDesign document and paste the text from the clipboard into it. In the target document, however, InDesign changes the order of the text components into a completely meaningless sequence

 "JAN Weihnachtsferien Ende .03 - DEZ .22"

I made another attempt with this text:

 "Eins 6 Zwei 5 Drei 4 Vier 3 Fünf 2 Sechs 1"

In the target document, InDesign turns it into the following text:

 "1 Sechs 2 Fünf 3 Vier 4 Drei 5 Zwei 6 Eins"

So it seems that the sorting isn't arbitrary, but rather a specific order is being achieved. But what's the point of this nonsense? How can I prevent this nonsensical behavior?

I use Release 20.5 x64 on Win10