90% of the current servos are drawing more than 10amps at a peak current spike. This is often a steering correction of the initial current to switch directions.
Put your car on the bench with weight on the tires, steer it back and forth quickly and see if you can watch your receiver reset, or led's dim out.
A DVOM or servo checker will not sample at a fast enough frame rate to catch these spikes. I'm not making this up, we've tested them all to find this issue.
Yes I would expect any new Tekin esc's being developed to have a more robust and stronger BEC in the future
