What does HRESULT 0x88980422 (UCEERR_TRANSPORTOVERLOADED) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: UCEERR_TRANSPORTOVERLOADED means the Windows composition transport is overloaded and cannot accept the requested rendering or composition work.

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UCEERR_TRANSPORTDISCONNECTED	UCEERR_PARTITION_ZOMBIED

UCEERR_TRANSPORTOVERLOADED

UCEERR_TRANSPORTOVERLOADED is a Windows User Composition Engine (UCE) HRESULT. It indicates that the composition channel cannot keep up with the volume of pending graphics or visual-update traffic.

What to check for UCEERR_TRANSPORTOVERLOADED

Profile high-frequency property changes, animation, layout invalidation, and rendering callbacks.
Coalesce frequent updates and avoid generating work faster than the rendering channel can consume it.
Check for a blocked renderer or GPU issue if the workload is normally modest.

Microsoft guidance for WPF render-thread failures

Diagnostic discriminator: Measure pending composition traffic and queue pressure while keeping the channel/version unchanged. This status means the transport exists but cannot keep up with queued work.

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