OP, I know EXACTLY what you are talking about!! Over the last two weeks alone, I have seen this same craft nine or ten times, and last week, saw it for 5 consecutive nights in a row, with at least 2 friends each time ( and none of them are really into the UFO thing, and were still absolutely amazed). Your description is basically spot on. It starts as a very faint light, almost indistinguishable from a satellite, aside from the fact it's no more than 15-20* above the horizon, and seems to be moving along a relatively straight flight path, with a slight "jumping" or "stuttering" effect. Then after watching the light for generally no more than 30 seconds to a minute, it all of a sudden Seems to EXPLODE with light for no more than 5 seconds, increasing in brightness probably by a factor of at least 50. In other words, goes from barely visible, to at least 10 times brighter then any other bright star in the sky I.e. Sirius, Venus, Saturn etc. for a period of 3-5 seconds. And also more times than not there are usually at least a couple of large aircraft in the direct vicinity, and on 2 different occasions there was a single aircraft flying in an almost identical speed and heading, seemingly chasing the object, which did not appear on my flightaware app ( in other words military aircraft that have not filed flight plans, also i live less than 100nm from Whiteman AFB , and see B2'S at least 2 or 3 times a year, and this object is quite plainly not a B2, nor any other standard aircraft). Also for what it's worth I am a private pilot and huge aviation nerd.
OP, you are not alone in these sightings, and even these particular objects are merely a drop in the bucket as far as the experiences I've had my whole life. Make no mistake you are being shown these things for a very important reason. We are on the cusp of something that will change everything. They are preparing your mind and heart. Live life with peace and love, and you will begin to be shown things that will change your life in a way you could never imagine even in your wildest dreams.
Peace and <3 to all,