Getting the same issue as well on Excalibur.

Date & Time: Oct/29/2019
Frequency: All the time.
World name: Excalibur
Character name: Timbavati Haydar
Retainer name: N/A
NPC name: The Smith NPC in Novice Hall Quest
Monster name: N/A
Class/Level: 15 Level Quest
Party or solo: Solo
In-game time: 11:55 PM
Area and coordinates:
Housing: N/A
Steps:
1. Start the first Novice Hall tank quest
2. Get to the part where the NPC uses Holmgang
3. NPC's attack goes off just as Holmgang releases you so you can't dodge, rendering the quest impossible to complete
*Add more steps if necessary

Connection Specs
- Type of internet connection/provider: Spectrum Broadband
- Modem maker/model number: Arris