With window-extension, is there a limit to the number of swf panels that can be opened?

[Firewood：D]

I installed some other people's extensions, including some I made myself. There are twenty or thirty swf panels in total.
Then after creating a new document, the swf panel cannot be opened through window-extension, there is no response to clicking, not all of them cannot be opened, and some phenomena that cannot be opened will randomly appear.
Is there a limit to the number of files in windowSWF? If not, why are there some that won't open in the windows extension?
The version I used to make the test is 2021

[kglad]

there's a limit to everything in animate, but i don't know the panel limit.  https://helpx.adobe.com/flash/kb/flash-movie-size-limit-flash.html