Hi, Will!
Your IVS version is V100R002C30SPC110.
The IVS version V100R002C30SPC110 does not have the local cache function, which led to live view delay when returning from 1 magnified pane to view all the other panes.
Solution
1. Optimized this issue in the version V100R002C30SPC207.
2. Installed the V100R002C30SPC207 IVS Client and confirmed that this issue had been solved.