Could it have something to do with region availability? I have my app available in Germany and Austria - the subscription was available worldwide. As soon as I changed the subscriptions availalbe regions to the same 2, the subscription loaded. Don't know if it was a coincidence or not.

Really? I can't believe nobody has this issue. It literally still happens just by returning false for some paragraphs from textContentManager(:shouldEnumerate:options:) -> Bool

NSTextLayoutManager.usageBoundsForTextContainer gives me a wildly inacurrate (much too big) height, and enumerating the documentRange.endLocation Y coordinate in reverse gives me a too small height. Any workarounds for these issues yet? I can't get any reasonable/reliable text height estimation from NSTextLayoutManager. And enumerating in a forward direction is not possible, since if you have lets say 10000 lines, this will destroy performance for a non-contiguous text view since we are always forcing layout of the complete text.

No. I am not sure how it even can be in the menus, since it is a CLICK combination.

No it doesn't. Xcode 26 just opens a new tab, whereas Xcode 16 opens the a new split pane.

I think I found it... you have to change this setting Settings... > Navigation > Group Navigation > With Option to "Uses Separate Editor Pane"

Nevermind, the issue was caused by some other component in the build pipeline.