v 1.2.91

trying to use the 'signal request' with a linked chest.

Click on signal request to 'on', close chest, reopen it is back to 'off'.

Set a Filter of "No Item", then signal request to 'on'.
Message logged 'open request items from signal, location [...]
The linked chest now shows a O and cannot be interacted with any more.

exactly the same for me. can someone explain how this 'signal request' feature works?

the 'signal request' only support The ID with item, if you not set the item, it now work.
IF it succeed, The gui will close, then you can paly other chest and set The same ID, you can see what in it.