Hi,
This is a very interesting issue, I had to research why this was happening. Basically what you said is correct, but the autocomplete field should have already followed that “scroll”.
I initially thought I can suggest a quick fix to this via a custom code (because the actual resolution is extremely simple as it turned out), but it wouldn’t work, as it needs to be added to the core scripts.
If it is okay with you, I will make sure to patch this withing the upcoming release, I already added the fix to the codebase.