Kuptain

Yes, it’s a shame that wasn’t caught in testing but the applications are so complex, and the upgrade to V2 was so big, that it’s almost guaranteed that some things will ‘slip down the cracks’.
Hopefully the next update will fix this.
Remember, you cannot open V2 files in V1, so if you go back to V1 you will have to start the document again (or go to the latest V1 version of it that you had before moving to V2).

Since there are three Affinity applications, and they are each available on three operating systems, it’s a good idea to say which application you are using and which operating system you are using.
That will help people to know some basic information before they try to help you.
There is currently a known issue in Publisher where selecting nodes via a marquee drag is not possible when there are multiple pages.
If that’s not the problem then can you upload a full-screen video showing us what the problem is, so we can see it happening for ourselves?