You found a bug! We've classified it as
EXTJS-23289
.
We encourage you to continue the discussion and to find an acceptable workaround while we work on a permanent fix.
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This is actually a known Ext JS bug: EXTJS-23289
The only workaround currently is to use your keyboard once the picker is open.
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Sencha User

Originally Posted by
mitchellsimoens
This is actually a known Ext JS bug: EXTJS-23289
The only workaround currently is to use your keyboard once the picker is open.
Oh, I see. Ha, duh, I should've thought of that. Thanks Mitchell!
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Sencha Premium User
This is still as issue more than one year later (using Firefox 59 beta).
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Originally Posted by
agarberi
This is still as issue more than one year later (using Firefox 59 beta).
Sorry, I no longer work for Sencha and doesn't look like anyone has been maintaining Fiddle since I have left...