Upgrading to 4.9.2 causing problems

I had a character I imported in 4.8, even then there were a lot of problems to get it working on android since it was originally a character for a VR game, after a lot of hard work I got it to work without crashing on the phone. After upgrading to 4.9.2, the screen on my phone flickers if I spawn this character into the map. How could using a certain type of actor as opposed to another cause the screen to flicker?