Hairpins change position after Save
I posted about a similar problem a couple of months ago. Then, it was pedal lines that were moving out of position whenever I saved, closed, and re-opened my score. No one could reproduce the bug and since it affected only one score, I didn't make an issue of it.
Now, it's hairpins (specifically, hairpin continuations over the page) that are changing position when I save, only this time, I don't even have to save, close, and re-open the score. I've attached a small, zipped screen recording where I add a hairpin, adjust its vertical position (both the start and continuation), and save. There's a short pause after I save, then, as you watch, you'll see the hairpin (Vlns. I staff, second page) move out of position all by itself! (Vlns. II are also affected; the hairpins were positioned before I made the recording.)
If you watch closely, you'll also see that I have some trouble positioning the hairpins. A single click on the arrows controlling the vertical offset in the Inspector causes the offset to be incremented by 2 steps instead of 1. This problem seems to be related to the length and number of instruments in the score. I haven't seen it when working on piano scores, but it's a routine annoyance that starts about halfway through all my orchestral projects.