AladinLite render of superimposed host and transient offset in Intel Macs vs Arm Macs

[genghisken]

This is a very odd error (highlighted by Michael).

See this transient:
https://lasair-ztf.lsst.ac.uk/objects/ZTF24abvyngn/

On an Arm Mac, the context map renders (correctly) like this:

But on an Intel Mac, the context map renders (incorrectly) like this:

The host and transient are offset north. In actuality, the underlying image render is forced south on Intel Macs.
Same error for both Chrome and Safari. Both render correctly in Arm, incorrectly in Intel, so the problem is in the Javascript I think!

[RoyWilliams]

I copied an example from the aladin pages
https://static.lasair.lsst.ac.uk/ztf/BBBimages/aladin.html
and it looks good on my Apple M1 laptop.
Who has an Intel-chip Mac to try this?

[genghisken]

I checked both Intel and Arm Macs. Both render the Pleiades superimposed stars correctly (in Chrome and Firefox). So something about the way we display markers is doing something odd. The Lasair web code renders the latest version of AladinLite, so it's possible that there's a bug in the latest version which is triggered by the way we display markers. Note that the problem does NOT exist (e.g.) the ATLAS and Pan-STARRS pages for the equivalent object (where I burn in the version of AladinLite).

[genghisken]

Incidentally - @RoyWilliams what did you do to make the "stack" problem go away on the lasair-lsst-dev web pages AladinLite?

[RoyWilliams]

Wrote to the developers. They updated the code.