I would also expect it to thermal before it hits lvc unless...
The lvc is set too high.
and/or
In spite of an impressive mah count on the battery, the battery itself can't put out anywhere near that so it starts to tease the lvc into triggering under load prematurely. That could be because the battery is old, was purchased from a website in English only so far as Google translate could get it that way from Chinese, etc., etc.