SOLVED - Never mind, silly me, worked it out, you just need to click on the lid once solved.
Hi,
Need some help with the puzzle box in the first free roam in episode 11.
I have followed the fan-made guide (there is no way I'd have worked out the puzzles without that) and it all goes well until the last step.
I have successfully opened all the sides, with the last being side 4. This suggests that you need to spell the word 'OPEN' on side 1.
I do that, press the button on Side 1 then go to side 4 and press the button, I get an unlocking sound but the puzzle remains open and other than the unlock sound there is no indication that the puzzle has been completed. The button on side 4 is now locked, can't be pressed again, which suggests it has solved, but the promised '2x Special Renders' do not appear and also, solving the puzzle box remains in the task list as if it hasn't been completed.
Any ideas?