debug_printf and sprintf behaves incorrectly.

Hello,

I'm making the operating system a hobby.

If debug_printf or sprintf uses "%f" in thread(is not process stack), STM32F1 behaves incorrectly. but STM32F4, STM32F7, STM32L0 behaves correctly.

You can download the full source code as follows: http://naver.me/xevVxbr2 

password is "1234"

or

https://github.com/mymy49/yss 

this project behaves incorrectly :

/stm32f103rb/NUCLEO-F103RB/ADC_EX

this project behaves correctly :

/stm32f407vg/STM32F4-Discovery/ADC_EX

/stm32l073rz/NUCLEO-L073RZ/ADC_EX

/stm32f746ng/STM32F746_DISC/ADC_EX