Calibre normally saves the 'state' of the view in the configuration files.
Things that can confuse this, is launching 2 instances: w32 and w64 as both share the config. Last one closed is the 'state' you will see
All other versions only allow 1 instance to be launched. (Calibre portable has its own config)
Other things that may mess with the save:
Your config folder is in/connected to the cloud. Cloud connected/shadowed folders need to be stopped while calibre is running
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