Ink annotation delayed

When testing the framework, we came across following problem:

In general, the ink annotation works fine, but on our Samsung Galaxy Tab S 10.5 LTE (SM-T805), it is delayed for a second ( it takes time until the ink appears). This makes it hard to draw or write correct. The problem is the same in the sample project, so it is not due to wrongful configuration. Also the tablet is pretty powerful and therefor shouldn't cause any problems. You got any ideas on how to fix that problem?

well it seems it actually is a problem with a lot of android devices having bigger touchscreen lags. Although the rest of the hardware of the Tab is good, the touchpad seems to be pretty bad.
thx anyway

we using Canvas to draw Inks when user touch and drawing inks.
maybe, invalidate() and onDraw() delay the time.