Substantial aliasing seen with iOS 18

[Nancy-Salpepi]

Test device
iPad 9th generation

Operating System
iPadOS 18

Browser
Safari

Problem description
For phetsims/qa#1141 and related to #316, after updating my iPad to the latest iOS, the aliasing is much worse for the side of the pool, blocks and shapes.

The pixel density is still listed as a 2 using https://johankj.github.io/devicePixelRatio/.

Visuals

ScreenRecording_09-17-2024.15-46-10_1.mov

[Ashton-Morris]

Test Device
iPad Pro 11 inch 4th gen

OS
Latest

Browser
Safari

I am getting the same aliasing as shown above.

[samreid]

@zepumph and I discussed. We feel we have limited options to keep memory within a good boundary to prevent crashing. We searched for webkit changes related to aliasing and did not find anything. It is possible Apple could improve this or make it worse in future versions. Let's check in at our upcoming design meeting.