Hi. I have seen something like that. I believe it’s caused by an incomplete OTA update.
As a workaround, your users can clear the app’s data and then open it and leave it open for a minute or two so that it has enough time to fully download the OTA update. Then restart the app to load the updated JavaScript bundle.
@charliecruzan gave me some suggestions (included in the comment linked above) which seem to have fixed it for me.