Serialization of forms is a problem for #1863816: Allow plugins to have services injected → so here's a patch that shifts entities (which are plugins) out of the recursive form array into the form_state arrays so that in a later step we can decide on how not to cache them (hardwire, move to form_state['no cache']['entity'], introduce form_state['no cache keys']). Small moves.
Postponed: needs info
11.0 🔥
forms system
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Just following up if still valid? If no follow up could close in 3 months
Unsure. form serialization has changed, we now basically only start to persist them on the first ajax request. So I think that basically makes this a non-issue unless those forms use ajax.
Lets just close this unless someone has proof that this results in a measurable improvement?