Bad contact shadow aliasing? (2.81)

[LoboTommy]

Could be from these recent changes:

Eevee/Workbench development updates

Now having Soft Shadows enabled is almost essential. So softness will depend on the radius/size of lamps (Angle for Sun lamp). Probably high values of Render samples will be necessary, so I’m not sure about how this will affect render times in general, and if some feature to increase only samples that affect soft shadows would be possible. This depends on Shadows settings in Render Tab, Cube size (Cascade size in Sun lamp). Large values in these configurations with new method now do not slow …

Try increasing your samples for softer / antialiased shadows.