Make into Frame

The attached file shows a score where I used the function make into frame. If I drag systems 2 and 4 manually all is ok. But why produces Dorico this result?
Praeambulum.zip (326 KB)

Don’t know why, but it’s easy to fix by going to Engrave Mode and turning on the staff spacing switch, then manually moving the systems where you would like them. It’s helpful to view the distance between staves in the ruler markings on the left side. It’s easy to make them all the same. Hope this helps.

I’ll ask Andrew, our page layout expert, to take a look at this and I’ll come back to you when I can.

We have found the problem and will hopefully be able to include a fix in the forthcoming minor update. Sorry for the inconvenience!

Thank you for looking in it!