Microsoft Excel 365 HUGE Memory Leak (50 GB RAM)

Hello! I wish you all a very happy New Year!

.. and back to the topic:
My Excel slowed down a while ago, I noticed a flashing black screen or black rectangles with text "calculation (...)". The problem could not be solved by changing settings in Excel or installing a new operating system. Today I noticed that accessing the network folder is slower than it should be... I did this:
1) In Hyper-V settings (I use virtual machines) I set the second network card to Hyper-V exclusive.
2) In the network settings (Windows 10) I have disabled the Hyper-V Virtual network adapter "Default Switch". All virtual machines will use second network card exclusive...

Results:
1) Access to the network folder is at full speed again.
2) Excel works noticeably faster (I use a lot of INDIRECT functions)

I hope you can find the source of your Excel problems. Good luck!