so glad you figured this out!!!
Oof, that sounds incredibly frustrating but echoing @perry I’m so glad you’ve found a workaround, even if it’s a “hacky bodge” (!) for now. Thank you sticking with it and writing up your notes- we’ll share them with our product team and totally agree that it should not be so hard to deal with encoding arrays of form attributes and debugging our forms. If it’s any consolation, you are not the first to struggle with this… Anyway, thanks again