There seems to be a weird and severe 'behaviour' bug with the new Barcrest machines in the arcade - couldn't see it on the "known issues" list.
When collecting nudges from a feature the machine nudges reel 1 down automatically until the nudges are gone. This happened on the first two machines I tried, Winner Takes All and Action Bank.
On WTA I had 15 nudges and an easy jackpot in view but it just nudged reel 1 down instead and ended the feature.
On Action Bank I had the cashpot on, pressed "Nudge for fruits" and got the reel 1 stitch up instead.
This phantom "reel 1" input only happens when collecting nudges, never when offered holds or indeed any other interaction involving reel 1 or its button.