I can confirm the issue was resolved. Thank you!
PHP and WP versions are available in the above link.
Just because many do it, doesn’t make it OK.
As an end user, I really dislike the garbage that plugins leave behind. Imagine the same behaviour on your Android/iOS device with apps occupying storage even after they were completely removed.
A solution would be to export the database (MySQL dump) and store that information in a “.php” file in the “wp-content/upload” folder as a data store.
If/when the plugin is re-installed, use that dump file to re-populate tables.
Maybe the option to remove the tables and options should be enabled by default?
Thank you for looking into this!