Calc keeps freezing

I am using Linux Lite 4.2 and LibreOffice Version: Build ID: 1:6.0.7-0ubuntu0.18.04.2

I am experiencing a random freezing of Calc when using spreadsheets. The spreadsheets are between 50 and 110Kb in size. I tried to figure out what is causing the freezing but it seems to be completely random.

System Info:
Processor :Intel(R) Core™ i3-7020U CPU @ 2.30GHz
Memory: 8081MB (1446MB used)
Operating System: Linux Lite 4.2
Harddrive: 128GB SSD

Resolution: 1920x1080 pixels
OpenGL Renderer: Mesa DRI Intel(R) HD Graphics 620 (Kaby Lake GT2)
X11 Vendor: The X.Org Foundation

If you need to have some more info please let me know.