Artefacts obstruct view

Hi! I have this thing where the contents of frame 1 remain visible when scrubbing throught the timeline of a symbol. It makes editing difficult. The artefacts disappear by going up one level and then re-entering the symbol. In my example you can see the hand twice and the arm is visible though the layer's visibility is off.

Thanks!

Bas

Animate CC 19.0 (326)

AMD Ryzen 7 1800X

Gigabyte GA-AX370-Gaming 5

MSI GeForce GTX 1080Ti Gaming X

Corsair Vengeance LPX CMK32GX4M4C3000C15R

Samsung 960 Pro 512GB

Cintiq 12"

Windows 10