Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wb/STM32WB10_CM4/DBGMCU/APB2FZR#0x0
APB2 Freeze Register CPU1
TIM1 counter stopped when core is halted
https://github.com/modm-io/cmsis-svd-stm32