I think that this is the original discussion of this issue? https://sourceforge.net/p/openocd/mailman/openocd-devel/thread/3d9f9eef-2f64-bcd7-d77d-aeaedd3639ab%40users.sourceforge.net/
Just adding the link for context and completeness.
- Fwd: Possible small bug in the Cortex-M7 core used by STM? Liviu Ionescu
- Re: Fwd: Possible small bug in the Cortex-M7 core used... Tomas Vanek
- Re: Possible small bug in the Cortex-M7 core used ... Liviu Ionescu
- Re: Possible small bug in the Cortex-M7 core u... Antonio Borneo
- Re: Possible small bug in the Cortex-M7 co... Antonio Borneo
- Re: Possible small bug in the Cortex-... Liviu Ionescu
- Re: Possible small bug in the Cortex-M7 co... Liviu Ionescu
- Re: Possible small bug in the Cortex-... Tommy Murphy
- Re: Possible small bug in the Cor... Liviu Ionescu
