Restless Cycles Platinum Valdo's Rest Watchstone Dissapeared

Good day. Iv been playing this game for almost 7 years.

So i bought the Restless Cycles Platinum Valdo's Rest Watchstone.
I ran with it in Valdo's rest for 2 days.

Use sextants on it and all.

It randomly dissapeared. Gone. So this is like 15ex when i bought it.
Any idea on why? how?

This is def not me, I kept in in, and did n 5 hour grind. POP just gone as i wanted to use sextants.

Please help

Regards Lutheria