On some heartrate values the last digit jumps to a new line and the next line is not shown. The screenshot shows 150bmp. With 151bmp it works correct.
I’m using a Redmi Note 10S with Android 12 and German language.
@Erik_Steinberg_5784 Welcome to the Zwift Forums, and thanks for flagging up this issue! 
I’ve passed your report and details along to our Devs.
Cheers!