Something that I've noticed in cooler climates such as Taiga is the presence of trees covered in snow with no snow covering the ground in Spring/Autumn/Winter with both Dynamic Trees and Serene Season enabled.

Picture above is a spawning of a fresh world with Serene Seasons in Summer which I then set to Spring/Autumn/Winter, showing fresh chunks of taiga having snow covering the trees but not on the ground.

Not sure which side is causing this or if this is intentional, but I wanted to point it out.

Same as me! I have both mods, It also snows on mountains/Taiga, I'm meant to be spawning in spring, Wonder which mod is the cause...?

This is most likely caused by Dynamic Trees. I'm not sure how their tree spawning works exactly, but it might be generating the snow on the trees itself

Same as me! I have both mods, It also snows on mountains/Taiga, I'm meant to be spawning in spring, Wonder which mod is the cause...?

Did you ever find the culprit? I have the same issue.