A handful of users are experiencing donation forms seemingly duplicating themselves. When viewing the All Forms list or attempting to edit forms, duplicate forms are present. The forms aren't actually duplicated, but the New View (in some environments) lists the same form multiple times.
The workaround is to use the Legacy View. Once in the Legacy View you'll see that the forms haven't been duplicated.
We are not able to reliably replicate this issue yet, and are still investigating possible workaround options. This issue may be linked to a theme or plugin conflict, but this hypothesis is still being investigated.