Dorico rearranges my overlapping gliss lines

I have an instance where I have a gliss ad lib. shimmer with three overlapping gliss lines. These are not real gliss lines, but just regular lines. But every time I open up the file, Dorico has displaced my arrangement of the lines. They are all attached to the initiating notehead.

I don’t see why the lines can’t simply stay put. I’m not even doing any work on that system or on that page anymore and I’m several pages beyond it, yet this happens every time.

The first image is how it ought to be, and the second is what Dorico does to it later on.

Can anyone help me with this?

Hard to help from a screenshot, I guess.

Could you create a small file, maybe only those two bars which show the problem and upload that here?

Thanks. I’ll try.