Disappearing line on graph

[JezShed]

Hi all,
Encountered a tiny problem with a line on my chart that disappears after I save and then load the PMDX.
I've tried to reproduce this with a really simple sheet and chart, but everything works fine. So it's something to do with this sheet, which isn't that complex, but does have a couple of plotted series and uses the new XLOOKUP (which is excellent by the way, thank you!).
When you load the PMDX (attached), both series show no lines, just the data points. If I select the "red" series and enable the line, it displays correctly.
Then I save the file, close it, and then re-open it. The line has gone.
The "red" series relates to x data of F4:F11 and y data of L4:L11 (I've shown those cells in red).
I suspect too that the data point markers are not keeping the size selected too.
So some attributes are being lost.
Like I say, I've tried some fresh spreadsheets with simple data, and everything works perfectly. So it seems to be with this spreadsheet file (which I created only a few days ago from scratch in PM, so I know it's not inherited something from another application).
I hope this helps. Let me know if I can supply any further info.

Version: PlanMaker NX Universal - Beta (rev S1417.0705) 64bit

[SuperTech]

Thank you for reporting this issue with the sample file and the screenshots. As you also mentioned, I can reproduce this problem with this file only, as there is no problem in newly created files, but I have forwarded this for further investigation.

[SuperTech]

Our developer team has fixed this issue for the next update.