Not sure if anything can be done from your side for this but see MJRLegends/Space-Astronomy-Feedback-#169

My idea for a fix.

Well, so much for that idea lol it's way worse than the gravestone, the clones are apparently capable of doing it without the gravestone entirely, and the clones isn't updating anymore either unfortunately, so whilst you could implement my idea, it'd be like trying to stop a tsunami with a pebble lol

What news on when this issue will be fixed?

Nothing to do on our side - you die, you drop items, grave captures it. It's up to other mods to cancel/modify/work around that event.

@boq well the developer of the sync mod doesnt update his mod anymore, is there a way you can make a workaround to make it work?

Sorry, but no. We have no way of knowing source of drops, so no filtering is possible.

Ok no worries