Blender Sculpt Has a Rare Behaviour at using DynTopo

Hi there i got this problem using sculpt with Dyntopo at a dinosaur model

I made this model with mirror and subsur but applied them before the sculpting

when i activate dyntopo and start to sculpt there are some rare edges coming to one direction but their are weird, here is a GIF:

Maybe im doing something wrong, but cant find what, someone has experienced this issue?

Upload the blend file to and post the link.

You might need to apply the scale and rotation on the model. This will cause a problem similar to your video.