Problem

When using a st.selectbox widget with many options, the dropdown always reopens at the top, even if the last selected option is somewhere down in the list of options. This is only noticeable when the dropdown has a scrollbar (i.e., when there are many options).

Related yet different issue: #4671

Solution

Preferred solution: The dropdown in st.selectbox always opens up at position of last selected option.

Additional context

From the user's perspective, reopening a st.selectbox dropdown at a position that doesn't show the last selected option is confusing.

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