I think mine does the same thing.
It doesn’t act like this just digging dirt.
But, when you are working on stumps and roots the dipper stick is over powered by the bucket curl.
I have had the LandPride 60” since 2021.
It is a shade lighter than the 60” fel bucket.
It is what is normally on the loader, unless I am doing backhoe work.
Well, I have the same droopy stabilizer leg on my Bh77.
Valve stack was replaced under warranty.
Couple weeks later stabilizer started drooping in about 10 minutes.
Bad problem is that it wont support the tractor very long when digging.
I have to keep adjusting that stabilizer when digging.