@tersiaws This could be a caching or a cookie issue. Can you share the URL? If you don’t want to post it here, you can send it to me using our Support form:
https://termsplugin.com/support/
@tersiaws Thanks for this report. You’ve definitely found a bug in the plugin. I’m going to issue a fix (2.5.1) today.
I would suggest, since you are using caching, to run WP Terms Popup with the “Load popups with JavaScript?” option turned on. You can learn more about it here:
https://termsplugin.com/support/load-popups-with-javascript/
Clear your cache after enabling that option. This might solve your problem immediately.