char type variables are flagged, but the code compiles successfully

Hello,

In a MPLABX 5.45 project for PIC32CM , any variable declared or used as char is flagged but the code still compiles successfully.
For example, in a file named UART.c, three of the char type variables are flagged after compilation is completed.

I am wondering if this is a sign of a bigger problem that my pop up later. A screenshot is included.

Any suggestions, PLEASE!

Thanks,Attachment 16341

This has apparently been an issue for quite some time now. See this.

Thank you Sir Galahad for pointing to the posts.