Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l0/STM32L052/DBGMCU/APB2_FZ#0x0
APB High Freeze Register
Debug Timer 21 stopped when Core is halted
Debug Timer 22 stopped when Core is halted
https://github.com/modm-io/cmsis-svd-stm32