This forum is intended for developers writing applications. You might get better information/help from the consumer community... https://discussions.apple.com/welcome?cid=gn-com-community-lp-get_help

I notice the log mentions the animation is happening on a background thread. I would look to see if you have anything running in background updating state values. SwifUI seems to be more sensitive to that than UIKit is.

You might need to batch the list of messages and do the remove in blocks that don't take so long on a serial thread. The tasks could dispatch the remove action to an appropriate thread if needed. I did that for a potentially long running import process using the Combine framework.

The testflight app should have an option to stop testing.

I don't know if it helps, but searching for "photo buff" shows your app.

I've had the impression that instruments only worked with apps running from xcode.

Click on the project in the project navigator. Click on the target. Click on build settings. Be sure the all tab is selected, just above build options next to the + button Selecting combined next to that makes it easier to compare. In the filter on the right, type "optimization level" without the quotes. Under Apple Clang and Swift compiler there will be drop downs to select the optimization level. For debug configuration the defaults will be none. Release ones "fastest, smallest" and "optimize for speed" respectively. Be aware that setting debug to other than none may impact breakpoint behavior as well as the ability to read variables due to code optimization.

I use parallels on my M2 Mac and it works ok with an arm release of windows 11.

You could try updating the optimization to match the release settings. I have a media player program using a fairly large core data database and they made a large difference.

Something that jumps out to me is you have the view frame set to zero. You might want to set it to use constraints.

The disabled enum isn't available under macos. The other enums list it. https://developer.apple.com/documentation/swiftui/menuactiondismissbehavior/disabled

Is the header file with the extension public and included in the framework umbrella header?

I believe that the percentage is based on one cpu being fully utilized. 190% would mean that two cpu's are being utilized.

You can create the Readme file. File | new file | select empty in the other section Name the file as desired.

Is there any chance an object is getting released unexpectedly? Also it would be worth being sure the animation is all on the main thread.