Fight - Walking the Beast - and not get diamantaire sollerets as wining report

[Sharnak]

Platform: PC
ISP: True Internet
Type of Internet Connection: Cable
Internet Connection Speed: 1Gb/100Mb
Date & Time: 10/2/2020 / 22.00 jst
Frequency: 1
Character Name: Lumil
Race: Hume
World: Asura
Main Job: Blu
Support Job: Dnc
Area and Coordinates: Fullmoon Fountain
Party or Solo: Solo with Trust
Monster Name: Carbancle Prime
Steps:

I fight Waking the beast (High Tier Battle field) on normal level.
After win , Winning report say the drop show as below.

Lumil defeats Carbuncle Prime.
You find a lock of Siren's hair on Carbuncle Prime.
Lumil obtains a lock of Siren's hair.
You find a clump of akaso on Carbuncle Prime.
You find a pair of diamantaire sollerets on Carbuncle Prime.
You find a copy of Rem's Tale, chapter 8 on Carbuncle Prime.
You find a copy of Rem's Tale, chapter 8 on Carbuncle Prime.
You find a pluton on Carbuncle Prime.
Lumil obtains a clump of akaso.
Battlefield clear time: 6 minutes, 25 seconds!
Battlefield clear time: 6 minutes, 25 seconds!
Battlefield clear time: 6 minutes, 25 seconds!
The current battlefield clear time record is 1 minute 56 seconds.
The current battlefield clear time record is 1 minute 56 seconds.
The current battlefield clear time record is 1 minute 56 seconds.
You cannot obtain the copy of Rem's Tale, chapter 7.
Obtained: Beitetsu parcel.

But after i check inventory about drop I found that diamantaire sollerets is not in my inventory.
Other loots are in my inventory as it must be but just sollerets is not there.
I never got that sollerets before so it's not problem about duplicate item.

I try log in and log out in case of may display problem but it's still none.