The filter lensblurr delivers a totally different result under an M1 MacStudio than on an Intel Mac

Yes i will try this on both machines at lunch break today…
"Advanced Settings uncheck GPU compositing" did not help unfortunately… 
M1: highlights blown out
Intel: looks right

I would be remiss if i didn't suggest resetting the photoshop preferences to see if that makes any difference.

https://helpx.adobe.com/photoshop/using/preferences.html

At my iMac it is PS 22 (23.5.5) under Catalina. It is so confusing that PS 2023 is Version 24.7.1
But at my Clients they run PS 2023 under Monterey on i7.

You aren't running Photoshop 2023 on Catalina are you? It requires Big Sur, as does the previous release.

https://helpx.adobe.com/photoshop/system-requirements/earlier-versions.html

There is one more setting to try in Adobe Photoshop>Preferences>Performance

Under Advanced Settings uncheck GPU compositing and restart photoshop.

Thats awkward. I send the thread to my client and they tested it and i tested ist an my iMac intel. Unfortunately the results are as in the first screenshots. changing the settings does not change anything.
Must be an unknown bug ?
We try to avoid the Lensblurrfilter and Tilt shift filter in our future workflow…

Thank you very much, I'll have to send this to my client. They all still work with Intel macs and the results look like my Intel screenshot.
Only with my M1 does it look like this with the blown out lights.

I can't say why your getting different results on your Intel Macs, but i can say the second screenshot

where things appear blown out is correct.
I tested a 2022 M1 Mac Studio macOS Ventura 13.6 photoshop 2024 (ps ver 25.0). A 2012 Intel

MacBook Pro macOS Monterey 12.7 photoshop 2024 (ps version 25.0), and a 2001 PowerPC Power

Mac Quicksilver G4 Tiger 10.4.11 Photoshop CS3 10.0.1 and they all gave results similiar to your second

screenshot when using the same settings.
 
I can suggest you try on the Intel Macs going to Adobe Photoshop>Preferences>Technology Previews

checking Deactivate Native Canvas, restarting photoshop and see if that makes a difference.

Or try Adobe Photoshop>Preferences>Performance, unchecking Multithreaded compositing and restarting photoshop.

Hi on the first Intel Mac i have Catalina and on the other i tested is Monterey.
And the results are the same whether I had Preview on or off.

What macOS are you running on the Intel Macs?

On the Intel versions, if after you apply the settings you have in the screenshots you posted, you click Preview off/on do the results change?