Excel buffering while working between 2 workbooks

Hi everyone,

Since the second last Office update, working in split screen with multiple excels has become very tiresome.

When working between 2+ workbooks, my excel suddenly needs a few seconds to "load" the excel book before I can start interacting with it.

Since the same update, it is almost impossible to work in a shared excel because everytime an edit is made by a different user, it has to restart to reflect the changes.

While I can probably learn to live with these issues, I would prefer not to. It is quite frustrating.

I have tried looking for this issue only but haven't had any luck. I would really appreciate it if anyone has any insight on how to fix these problems.

Thanks!

Edit: my excel version is Microsoft Excel for Microsoft 365 MSO (Version 2603 Build 16.0.19822.20086) 64-bit