0.001 mm error

My software started showing an abnormal error.
The distance between two parts are 50 mm but software sometimes shows it 50.001 or 49.999
this happens when i find the mid plane betweens two objects and mirror my parts.

Now my software is too slow and even to select a part i need to wait for 10 seconds.
I am using Ipad pro 2020 running ios 14.8 and my shapr3d is the latest version.
I am really struggling with this lagging software and the errors that affect the accuracy of my design.

Is there any solution?

can you share the problematic file in .shapr format here or if it’s confidential send it to support@shapr3d.com?