The text layout code is expecting the quantity of glyphs is equal to the cells allocated for each line #3546
Description
The issue is found in CustomTextLayout:
Instead of carefully process the clusters input, CustomTextLayout drops nearly all the information from clusters, and only keeping how many columns a cluster occupy, and later it is expecting that the glyph quantity equals to the quantity of clusters. This may lead to incorrect rendering result for many cases (complex script, ligatures, etc.)