Update of dynamic property plugin has no effect

Hello,
I just updated a few dynamic property plugins. Testing the new plugin in the Admin UI Tools interface confirms the new behaviour works as intended. However, creating objects in the ELN-LIMS, all dynamic properties are still populated according to the old version of the respective plugin scripts. behaviour. Do we somehow have to sync the web UI and the plugins?

We already tried server restarts, cache cleanup, session logout/login, to no result.

Any hint would be highly appreciated.