The previous behavior was to ignore fetch=LAZY, and give priority to NO_PROXY which was, well, better than the current behavior of ignoring NO_PROXY, since fetch is defined as a hint.

Actually I just tested this myself on H5, and that’s not the behavior I observed.

What I saw happen in H5 (in my test only) was that fetch=LAZY won over NO_PROXY for a polymorphic association even in H5, so I’m not sure I see where the change to behavior is. (Perhaps it’s only in certain corner cases.)