Thank you for bringing this issue to our attention. After careful consideration, we have determined that other higher-priority issues should take precedence, and we have decided not to address your issue at this time. The priority level is determined by factors such as the severity and frequency of an issue and the number of users affected by it.
In this specific case, the work done to support touch screen keyboard should have addressed this. Unfortunately, due to the nature of the work (which includes a refactor on the TextField in addition to other miscellaneous adjustments done to the focus), it is considered too complex and risky to backport to 21.3. We appreciate your input and understanding, and please let us know if you have any other concerns or issues you would like to report in the future.