LibreCalc: frozen file with DDE

I installed LibreOffice Version: 5. 4. 2. 2 (x64).
I have a file in LibreCalc that i put in connection with my Metatrader 4 through DDE (dynamic data exchange)
Now, when I open the file, it becomes unmanageable. it is as if it were frozen. It moves so slowly as to be unusable.
Have you also found this problem? you have to suggest any solution?