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Can you confirm that you are using Chrome browser to attempt to print your form?
If that is the case, this seems to be a bug that's inherent to the Chrome browser. Unfortunately, there's nothing much we can do from our end. We can hope that this will be patched by Google on the next Chrome update.
Upon investigating further though, we have found out that the print preview works on the second attempt.
Can you please try this on your end?