RPs and BPs not showing after leaving app

I've been putting Resource Packs on Minecraft and for some reason everytime I leave Minecraft after a few minutes or hours, all of the Resource Packs and Behavior Packs disappear. It's really annoying since I have to keep putting the same Resource Packs and Behavior Packs all over again. Also I've checked in the folder where Minecraft's NEW location is (Android/data/com.mojang.minecraftpe) and the Resource Packs are STILL there?