This only appears to repro on a published place, which seems odd.
Simple repro appears to be any script (running in a published place) that calls into a function. Set a breakpoint on function invoking line and try to step into, observe Studio hang. As a side note I’ve only tested this with a server script.
print("Hello world!")
local function add(a, b)
return a + b
end
local a = 1
local b = 2
local c = add(a, b)
print(c)