Hello @JanP,
Thanks for reaching out to the Toradex Community!
Since you said it worked just fine with IDE extension V1 and now it has issues on V2, it really looks like a conflict between the two versions installed on VSCode.
Please take a look at this answer from @lucas_a.tx on a similar topic.
In summary, if you are trying to use V2, you must make sure that you have disabled V1 of the extension. Please let me know if that helps 