A few of conversation using Chinese font shows up as garbled text on SFB for Mac and iPad

[KyleZC]

I run into this issue recently. Some conversations I received show up as garbled text. The same situation happened on both MacOS and iPadOS. OS X version is 10.15.4. iPadOS is 13.4.1. SFB is 16.28.175. The capture attached as below. Perhaps it's some wrong with non-unicode text. All of garbled text are normal Chinese font. Please let me know how to fix it. Thank you.

[#2]

After test, the conversation from Office365 SFB user will be garbled text. But no garbled text from SFB 2016 user.