It is unfortunate that you have come across such issues using AppBuilder.
Is it possible for you to send us the actual project where these reproduce or even better, a sample project where the issues are isolated? This will help us investigate what could be causing the matters and so, provide possible solutions or workarounds. Please, if you decide to share your work with us, do it in a private support ticket, as the forums are not confidential.
Further, you can also debug your
code and check if there aren't any errors in the console output.
I am looking forward to your reply.
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