Window.SizeToContent and TextBlock TextAlignment reset during runtime

[Discostoff]

Hello,

i'm creating an application that updates the UI very often, sometimes my TextBlocks change the property of the TextAlignment from Center to Left and goes back to Center. Same for the SizeToContent property, i set the property once at the start to SizeToContent.Height, sometimes when the UI is refreshing and you change for example the size of the window.Height or window.Width, it reset to SizeToContent.Manuel on my windows and doesnt go back to the initial value. I'm on version 11.3.1.
Does somebody else experience the same behaviour or has a solution?

this is with SizeToContent.Manuel

this is how it should look like with SizeToContent.Height