I tested on 3.0.3. When testing, I cannot recreate this behavior for patron stat cats, even with the caveat of unset value and/or reset back to no value. What I'm observing is the inability to type-to-select without any additional selection being made. I tested both registering a patron and an existing patron account. Within the item editor, however, I am seeing the behavior you mention on item stat cats. What I see is that, instead of the filtering options populating, the select option jumps down to the beginning of the letter typed. For example, if I type "k" in the item stat cat dropdown, it will jump down to the start of k's in my list, such as kit. I see similar behavior in other interfaces not related to stat cats, such as typing "k" to select through all of the different libraries starting with k when selecting a pickup library location. My best description of the behavior is like that of a "Find on this Page" feature and less like a filter.
I tested on 3.0.3. When testing, I cannot recreate this behavior for patron stat cats, even with the caveat of unset value and/or reset back to no value. What I'm observing is the inability to type-to-select without any additional selection being made. I tested both registering a patron and an existing patron account. Within the item editor, however, I am seeing the behavior you mention on item stat cats. What I see is that, instead of the filtering options populating, the select option jumps down to the beginning of the letter typed. For example, if I type "k" in the item stat cat dropdown, it will jump down to the start of k's in my list, such as kit. I see similar behavior in other interfaces not related to stat cats, such as typing "k" to select through all of the different libraries starting with k when selecting a pickup library location. My best description of the behavior is like that of a "Find on this Page" feature and less like a filter.