I'm using OpenWRT 19.07.2 on an arm_cortex-a9_vfpv3 router and I haven't got any updates for a while. I checked https://downloads.openwrt.org/releases/19.07.2/packages/ and it seems the last update that arm_cortex-a9_vfpv3 got was on 19 Apr while others have been normally updated after that. I googled a little and quickly searched in bugs.openwrt.org without finding any relevant info. Anyone's got an idea what happened to the repo? Thanks.
I hope that you are building from source or using snapshots and not upgrading packages in place (unless you are selective and know what you are upgrading and why)... see this thread for context (arm_cortex_a7, but still indicates the potential risk).
Or just wait for maintenence updates to the stable release builds. If you selectively upgrade packages that are not part of the core/critical system, it may be okay, but it is generally not recommended unless you really need the specific upgrade for security or feature reasons (more recent does not always mean better, or at least it doesn't necessarily equate to better on a given version/installation).