Objects disappear when zoomed plus Undo function malfunctions

The selected frame is visible when i zoom but many times objects disappear when zoomed in but appear back when zoomed out as demonstrated in the video.

The undo function does not go back to the start of changes and the number of undos is limited, sometimes does not even go one step backwards

Hello, could you please let us know what is the version that you are currently using?

my current version is