The tags only apply when setting a custom jsFilename but an error is logged in the console

[Nureckiy]

After configuring the tag with a Tag Manager (hotjar in my case), it doesn't work by default until jsFilename is set to "https://<mydomain>.containers.piwik.pro/<siteId>.js". Then it works fine, but siteId and setTrackerId are added twice to the _paq variable and the following errors are logged in the console:
The method setTrackerUrl is registered more than once in "_paq" variable. Only the last call has an effect. Please have a look at the multiple Piwik trackers documentation
The method setSiteId is registered more than once in "_paq" variable. Only the last call has an effect. Please have a look at the multiple Piwik trackers documentation

Any ideas how to avoid this? Thanks in advance!