Calculate cell height failed when use attributedText

When i use textView.attributedText instead of textView.text cells height are damage and cell drown on top of each other, can you help please.

Start by reproducing the cell-height failure with textView.attributedText instead of textView.text. Trace the sizing path for the affected chat cells and compare the two text representations; done means cells with attributed text calculate their heights correctly and no longer overlap.

Written by the indexing model from the issue text.