You posted your question in the Telerik Platform forums. Telerik Platform is an end-to-end solution for building mobile applications. It does not include a RibbonBar and I am therefore not sure I understand what Telerik product you use in your development.
In order to address this question, we need the following information:
What Telerik components you use
Telerik components version
Applied themes
Code snippet or a sample project demonstrating the issue
Having the above information will allow me to forward your question to the appropriate support specialists. Further, please make sure to post your questions under the product they are targeting. Only then they will reach the respective teams and you will receive a prompter response.
Regards,
Tina Stancheva
Telerik
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