Tree Support interface missing

I’ve just noticed that, on my latest print, the support interface that usually generates on “Tree (auto)”, didn’t generate; and instead just generated a few thin lines across the branches.

I’ve attached a photo of the tree support from my last print (top one) alongside an old tree support from a few weeks ago (bottom one). I haven’t changed any support settings other than the type and setting build plate only.


“Normal (auto)” supports seem to generate the interface just fine.

Does anyone have any ideas on what could be causing this?