After collecting 10 glass motif fragments, I went to the mystic in Orsinium and bought a Merethic Restoratuve Resin to combine them. When I used the resin, it disappeared as if it had been used, but I didn't get a motif chapter and still have all of my fragments. I relogged and decided to try another resin and had the same result. I am now out 20,000 gold.
Is this known bug?
PS4 Pro NA