I just recently switched to LayOut 2019. Today I ran into an issue that I don’t think I caused.
In the middle of my LayOut session, my default text, dimension, and shape styles changed. See screenshots from my project file, where most of the dimensions and shapes are similar (these are my default template settings, I did not change them for this project) and then the highlighted elements that are reset to (presumable) LayOut defaults. Also note that Labels, which I have not used in this project so far, are still on my template defaults, as they should be.
So did I accidentally hit a command that I’m unaware of? Or is this a bug? Or what am I missing?