Currently we are performing extensive testing on various devices and emulators with different versions of android in order to track down and isolate the root cause of the problem. We have tested the native android browser on android version: 4.0, 4.2, 4.4, 5.0 and 5.1
Can you verify if the issue can be replicated on the attached simple test page containing only a RadMaskedTextBox running with the latest Telerik assemblies (also attached in the project)
If possible also share whether you replicate the problem in Chrome (on the same device) or only on the native android browser, the model of the mobile device will also be helpful since different vendors may have different versions of the default browser.
This information will help us to verify if we are observing the same behavior as you do.
Thank you for your cooperation.
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