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image flicker on FILLPATTERN from base64 string #62

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@rejuce

Description

@rejuce

Description

I receive a small .png image as MQTT payload encoded as base64 string. I want to display that image inside a sheet

Steps to Reproduce

receive mqtt payload abse64 encoded png into cell G3
=READ(INBOXDATA(,,"value"),G3,"String",,FALSE)

prepend "data:image/png;base64, to it and set it as fillpattern on a rectangle
=DRAW.RECTANGLE("523506426300","Rectangle10","Rectangle9",7078,2699,14155,4763,,FILLPATTERN(CONCAT("data:image/png;base64,",G3)))

launch sheet and process messages, tried time based and msg based

Expected behavior:

newly incoming image overwrites current image flawlessly

Actual behavior:

before the old image is overwritten, it is replaced by a white image, regardles sof the set background, or another colored shape behind

Reproduces how often:

continously

Versions

2.2 - even when I launch the update.sh script, thats the version I get

just look at the small videoclip
top image hase a black rectangle behind, bottom one diretly on sheet
https://user-images.githubusercontent.com/28755821/124262422-54a6d700-db32-11eb-9e0d-415937573712.mp4

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