Not a problem, I hope you enjoyed your vacation!
Are your other (non-problematic) platforms using non-Intel GPUs? The XeLL classes/functions you are referencing are part of the third party Intel XeSS plugin. Strictly speaking, you should approach the plugin developer (Intel in this case) for support for third party plugins, but I can provide some support based on a cursory look.
It looks as though there are a few situations where you can enter a code path where your desired tick rate isn’t utilised:
- When r.XeLL.MinIntervalUS is set to a value other than -1
- When r.XeLL.DisableTickRateHandler is set to 1
- When the XeLLMode flag is set to 0
As a next step I would see what these are set to in your project, and if necessary tweak them to observe if you can get the desired behaviour.