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View Full Version : Progressive Input Lag When Images Are Open - Started Recently on v5.0.0



ppostel
January 20th, 2026, 01:14
Please see technical issue below. Thank you in advance for any help you can provide!

- Paul Postel

Summary
On 01/07/26, system-wide input lag began occurring whenever any image (maps, handouts, etc.) is opened. The lag progressively worsens the longer the image remains open and immediately resolves when the image is minimized or closed. This behavior occurs regardless of image file size and persists even with all extensions disabled.

Ruleset(s):
Dungeons and Dragons (5E)

Extensions / Themes:
None (All extensions disabled; issue persists.)

Modules Loaded:
D&D Curse of Strahd
5E SRD 5.1.0 Magic Items (Legacy)
D&D Monster Manual (Legacy)
D&D Player’s Handbook (Legacy)
D&D Curse of Strahd – Players
D&D Explorer’s Guide to Wildemount – Players
D&D Tasha’s Cauldron of Everything
D&D Tasha’s Cauldron of Everything – Players
D&D Volo’s Guide to Monsters
D&D Volo’s Guide to Monsters – Players
D&D Xanathar’s Guide to Everything
D&D Xanathar’s Guide to Everything – Players

Operating System / Language Setting:
Windows 11
English (US)

Graphics Hardware / Driver:
GPU: NVIDIA GeForce RTX 3060

Driver: Game Ready Driver
Version: 591.74
Release Date: Mon Jan 05, 2026
Installation Method: Clean install

Steps to Reproduce:
Launch Fantasy Grounds after updating to version 5.0.0.
Load a D&D 5E campaign.
Open any image (map or handout).
Observe mouse movement and click response degrade over time while the image remains open.
Minimize or close the image.
Observe that the lag and stuttering immediately stop.

Expected Result:
Images can remain open without causing system-wide input lag or degraded mouse responsiveness.

Actual Result:
Mouse movement stutters and skips.
Mouse clicks are delayed by one or two seconds.
Lag worsens the longer an image remains open.
Issue occurs regardless of image size.
Issue stops immediately when the image is minimized or closed.

Additional Notes:
Behavior began after updating to Fantasy Grounds v5.0.0.
Issue persists with all extensions disabled.
Xbox Game Bar overlay was not enabled.
NVIDIA overlay was previously installed but has since been uninstalled.
Issue appears tied specifically to image rendering.

Trenloe
January 20th, 2026, 01:43
Can you do a quick experiment please?

1) Reset the GUI scale to 100% with the chat command /scaleui 100 - does that make any difference?
2) Do any of the /vsync or /imagequality commands make a difference? Info here: https://fantasygroundsunity.atlassian.net/wiki/spaces/FGCP/pages/1638006786/Reducing+GPU+Usage#The-vsync-command

ppostel
January 20th, 2026, 02:39
Can you do a quick experiment please?

1) Reset the GUI scale to 100% with the chat command /scaleui 100 - does that make any difference?
2) Do any of the /vsync or /imagequality commands make a difference? Info here: https://fantasygroundsunity.atlassian.net/wiki/spaces/FGCP/pages/1638006786/Reducing+GPU+Usage#The-vsync-command

Thank you! Changing the Video Sync to 3 seems to have done it. I recently switched monitors, so that was probably the culprit.

Thanks again!