I noticed this problem some time ago, But I forgot to make an issue about it. It's very noticable with Tiled TAESD and with upscaler, not as much with tiled VAE.

It happens with tiled VAE when the resolution isn't a multiple of 128 in both dimensions, with tiled TAEsd when the resolution isn't a multiple of 256 in both dimensions, and with the upscaler when the resolution isn't a multiple of 512 in both dimensions. (so 4x the tile size?)

Example:

• SD1.x, 512x576 resolution : both tiled autoencoders and upscaler are broken

VAE	Tiled VAE	TAESD	Tiled TAESD

VAE + upscaler

• SD1.x, 512x640 resolution : only tiled taesd and upscaler are broken

VAE	Tiled VAE	TAESD	Tiled TAESD

VAE + upscaler

• SD1.x, 512x768 resolution : only upscaler is broken

VAE	Tiled VAE	TAESD	Tiled TAESD

VAE + upscaler

(I swear it's using the exact same prompt as the other examples)

• SD1.x, 512x512 resolution: control, everything is fine

VAE	Tiled VAE	TAESD	Tiled TAESD

VAE + upscaler