Using Standard Controller on some games will show that the Down button has been held

[clydedatastruct]

Not sure if I'm posting this in the correct section, but some games will automatically move the selected option down as if the down D-pad button is held. The actual down button is not held down when the issue happens.
Multiple games (across regions) have been tried for this issue.

Issue present on the following:

• DDR Hottest Party (US)
• Dancing Stage Hottest Party (EU)
• DDR Disney Grooves (US)
  

Issue not present on the following:

• DDR Hottest Party 2 (US)
• DDR Hottest Party 3 (US)
• DDR Music Fit (JPN)
• DDR hottest party 4 (EU)
• DDR II (US)
  

Setting the controller mode to Dance Pad will produce a different bug involving inconsistent mappings, which might be on a separate thread.
Currently using the 5.0-7139 dev build, but the issue also happens on the latest stable version. Not sure if this bug with the standard controller is present on GC or non-DDR Wii games.