ur5 display is missing parts on meshcat

[nim65s]

According to several attendants at JNRH 2023

u3 & u10 are OK

[sea-bass]

I saw this too in upgrading from Pinocchio 2 to 3 -- previously the meshes were all white in meshcat, but at least fully visible. Now they are either properly colored or missing as the issue mentions. Maybe there is something happening with alpha channels?

[andreadelprete]

Hi, also the students attending my class are experiencing this issue. Is there any way to fix it?