Why the codes wriitten for Compare Interrupt in STM32F373 seem to be cutting off when enterring debug interface?

[yundm2]

There is a strange case that the codes wriitten for Compare Interrupt in STM32F373 seem to be cutting off when entering debug interface as shown in following shortcut. The one of two red breakpoints setting in programing interface are changed by a grey exclamation mark alse the codes according two breakpoints are completely same as HAL_IncTick(); Why?

Thanks for any advice.

[TDK]

Not completely sure, but the chip has a limited number of hardware breakpoints, something like 4 or 6. If you exceed that number, some will be disabled.

Try disabling all breakpoints except for 2 or 4 of them.