Voice-over keys fail to modify value when textbox is blank for html input type 'number'

When voice-over is active and focus reaches an input of type 'number,' the prompt instructs to press Control + Option + Shift + Down Arrow to interact. Once interaction is initiated, pressing Control + Option + Down Arrow decreases the value, and Control + Option + Up Arrow increases it—this works seamlessly. However, if the value in the textbox is cleared and left blank, pressing Control + Option + Down Arrow or Control + Option + Up Arrow fails to modify the value.

tried on Chrome and Edge