Summary
UE 5.8.3 regression: In the unmodified First Person Blueprint template, the listen-server host sees a remote client’s running and jumping animations playing too slowly on the large Movable ground surface, while movement speed remains correct.
Another client observing the same player sees normal animations. On the existing Static platforms, the animations appear normal on the host as well.
The same issue does not occur in my UE 5.7.4 comparison test. No character, animation, or floor Mobility settings were modified.
What Type of Bug are you experiencing?
Animation
Steps to Reproduce
- Create a First Person Blueprint template project in UE 5.8.3 and open the default Lvl_FirstPerson map.
- Leave the default scene unchanged. The large lowest-level ground surface is Movable, while the yellow and elevated platforms are Static.
- Set PIE Net Mode to Play As Listen Server, Number of Players to 3, and enable Run Under One Process. Leave network emulation disabled.
- Start PIE with one host and two clients.
- Position the host and Client 1 so both can observe Client 2.
- Control Client 2 and run and jump on the large lowest-level Movable ground. Compare the host’s view with Client 1’s view.
- Move Client 2 onto the existing Static platforms and repeat the running and jumping comparison.
- Repeat the equivalent test in UE 5.7.4 for comparison.
Expected Result
The host and Client 1 should both observe Client 2’s running and jumping animations at the correct playback speed, on both Movable and Static surfaces, as in UE 5.7.4.
Observed Result
In UE 5.8.3, Client 2’s animations appear to play in slow motion when viewed by the listen-server host while Client 2 is on the Movable ground. Character movement speed remains correct.
Client 1 observes the same Client 2 with normal animation playback. When Client 2 moves onto the Static platforms, animation playback also appears normal on the host.
This problem does not occur in my UE 5.7.4 comparison test.
- Top left: Client 1, observing Client 2.
- Top right: Client 2, the controlled player.
- Bottom: listen-server host, observing Client 2.
Tested affected version: UE 5.8.3, CL 58210709.
Comparison version: UE 5.7.4, CL 51494982.
Affects Versions
5.8
Platform(s)
Windows
Video
Additional Notes
This appears to be a regression from UE 5.7.4 to UE 5.8.3.
The video uses an unmodified default First Person Blueprint template scene. The large lowest-level ground surface is Movable, while the yellow and elevated platforms are Static. No floor Mobility settings were changed.
Video layout:
- Top left: Client 1 observing Client 2.
- Top right: Client 2, the controlled player.
- Bottom: Listen-server host observing Client 2.
Only the host sees the slow animation on Movable ground. Client 1 sees the same player normally.
PIE settings: one listen-server host and two clients, Run Under One Process enabled, network emulation disabled.
Affected build: UE 5.8.3, CL 58210709.
Unaffected in my comparison test: UE 5.7.4, CL 51494982.