I have done some more testing with this and found 2 pages where there's a button which is a link to another button on the same page which contains a jump to another page. Both the destination pages are similar and the source pages virtually identical (the macros containing the jumps differing only by the actual destination of the jump), but on one source page the link button works, but not on the other page. Nothing I could do would make it work.

So I copied the action from the working button to the other and it worked, although of course ending up on the wrong page.

So then I edited the macro and chose a different destination to the jump, in fact back to the correct destination again and surprisingly found that it works.

I now have EXACTLY the same contents of the 2 macros (that contain the jumps) as I had before when one didn't work, but now it does. Surely this can only be considered a bug?

Is there any way to avoid these pitfalls, or even a reliable fix when they occur?

Someone tell me the NGs don't suffer from the same problem - please.