Hi Peter,
Greetings from Syncfusion, we have analyzed your query and prepared a sample to replicate this issue and we are not able to reproduce this issue in Android and iOS because by default the trackballs will be automatically arranged smartly in these platforms. In UWP we were able to reproduce this issue and we can avoid this by using TrackballCreated event and merging the labels together. You can find the sample we prepared from the below link.
Thanks,
Michael