Mostly stable test environment items issue

**Describe the bug**
After testing different cores I found mostly stable TrinityCore repack which allows for mostly safe teleporting without disconnects, visible mobs, some kind of working combat but there still are few issues that may be present on other repacks. In this server case, each time I equip item, it goes grey and doesn't show on character, but relogging always solves the issue. I tried to capture it in the stream of logs, so it is somewhere here:
21:26:27 | Warning | WorldSocket | C

P S | Received opcode CMSG_AUTO_EQUIP_ITEM (14744).
21:26:33 | Debug | WorldClient | C P>S | Sending opcode CMSG_AUTO_EQUIP_ITEM (266) with size 6.
21:26:33 | Debug | WorldClient | C P>S | Raw header (6 bytes): 00-06-0A-01-00-00
21:26:33 | Debug | WorldClient | C P>S | Total bytes on wire: 8, first 16: 28-37-25-A5-0A-2C-FF-1A
21:26:33 | Debug | WorldClient | C P