Did alphabetical incremental search break on the latest update?

previously when I had in the collections sidebar focussed if I typed "M" it woudl scroll to the `m_estimation` collection. "ME" to `measure_rvs` and "MECH" to `mechanism_design`. I understand we call this incremental search?
Now "M" scrolls to `m_estimation` and then... the cursor stays there. Further letters do nothing. Is that intentional? Is incremental search no longer supported?
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