Did you compile using OpenWrt 19.07.7 as a base?
Please avoid flashing images based on OpenWrt trunk unless you're sure
of what you're doing (there is some risk involved in upgrading to images
with DSA switch driver and even more in downgrading afterwards).
So, compiling with 19.07.6 (as suggested at
libremesh.org) is ok and
compiling with 19.07.7 is not? Is that correct?