Project f5 or f6 loading forever

[solar walrus]

Sounds like it gets stuck somewhere before the first rendering frame.
Possibly some infinite loop during some nodes _ready

[solar walrus]

Or maybe a custom setter function

[glad cargo]

I think, if that's the case, it should say "stack overflow" in the debug tab

But I'll check

Thank you

[solar walrus]

Infinite while loops will usually freeze and then crash
You can get a call stack overflow by calling functions recursively, that would indeed pause execution and send you to the debug tab