Question WP toolkit -> Plugins is regulary outdated (wrong version and name of plugins)

[harmut]

Server operating system version

Ubuntu 20.04

Plesk version and microupdate number

18.0.60 #1

I have no idea where to clear the cache of that overview page .../modules/wp-toolkit/index.php/index/plugins
Somehow hidden in some cache is the wrong name of a plugin taken from it's twin.

Installed, only shown in .../modules/wp-toolkit/index.php/index/list -> Tab "Plugins" after Refresh

<?php /* * Plugin Name: ABC * Description etc */ const XY = true; //switch for ABC/DEF


Not installed, but shown in the given overview page
<?php /* * Plugin Name: DEF */ const XY = false; //switch for ABC/DEF


This is one of different issues with the plugin. Plesk also showed the following update hint (on .../modules/wp-toolkit/index.php/index/plugins):

DEF 1.01 - example.com
! A new version is available.
[Update to version 1.20]
[Changelog]

DEF 1.20 - example2.com
! A new version is available.
[Update to version 1.01]
[Changelog]

I consider also a bug in Wordpress or the plugin itself for the 2nd issue, but the first issue is contradictory within Plesk itself. I'm happy for any hint to check.