Thanks for the review!
In the past, when plugin users have encountered language problems like this, it has been due to the WordPress database settings. Specifically, the collation of the wp_abd_shortcodes database table (where wp_ is whatever table prefix your WordPress install uses).
An example of this problem can be found in the support forum for this plugin: www.ads-software.com — Ad Blocking Detector Support –Doesn’t support Greek language
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If you check the collation and ensure it is one which supports Hebrew lettering, this problem will most likely go away. The most common collation that supports Hebrew is utf8_general_ci. There are several other collations that would also function.
The simplest way to check and fix collation issues is using a tool like phpMyAdmin. Most web hosts provide a database management tool like that. Log into the database tool, select your WordPress database, then the wp_abd_shortcodes table. Then click “Operations” tab. Collation should be available under “Table Options.” Screenshot: https://1drv.ms/1HGeLjt
This will not automatically fix existing shortcodes. You will need to return to Ad Blocking Detector and create new ones, or edit and fix existing ones.
If you have command line access, and no graphical tool, you can alter it using an instruction like the one found here: https://stackoverflow.com/a/5468980/2523144.
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Hope this helps!