Advanced Module Manager shows up Module at...

We have issues with multiple modules in past period. They show up randomly above pages in their position but the module is restricted to only one menu-item. Our customer noticed it multiple times now. After some time the module dissapears again.

Hi Peter, unfortunately that's not enabled.

Yes I know that, but the items it shows up are also the ones with menu-items.

Can you explain to what menu item you have set the condition?
> Hoofdmenu - Contact page

Are there any other rules in the condition set?
> Condition Set: For Module: Contact - Google Maps
> Opnemen Menu-items - Contact
> Ook aan onderliggende items: Nee

On what url do you see the module where it shouldn't be?
> I'd rather not share, but we got multiple screenshots from customer, past months. And this week also for another module on different sites.

And do you have some form of server cache or 3rd party caching going on?
> No, also the module isn't changed for long time now, so caching should not be an issue because the module shows up for a while on differrent pages and then disseapears again. There are also multiples sites on the server and in multiple sites this occurs.

Also we cannot reproduce the problem, we received multiple screenshots from customer where the problem shows up. We thought it could be when updating the extension, that it falls back on Joomla module setting, but after I changed the setting also for Joomla on all sites last week the problem happened again yesterday.