Concerns over SaveMethod technique in ASP.NET Core

[MaximBalaganskiy]

I'm a bit concerned regarding the usage of SaveMethod callback.
In a real-life scenario this callback will capture a controller reference.
If the controller allocated any resources, they won't be cleaned up until the WebReport is expelled from the cache.
Somehow, an idea that an old controller instance will be hanging around makes me uneasy.
Are there any alternatives to this report saving method?
I can modify the online designer code slightly to pass the report template to the iframe parent and handle saving from the SPA itself,
but would prefer an out of the box solution.

[Alekarfes]

Thank you for your suggestions, we will take a look at them.

[MaximBalaganskiy]

Have you found the time to look into this?