Mending isn't working on my pickaxe. I have it equipped and am not wearing any mending enchanted armour or elytra. It mends to about hallways and won't go any further, I've mined heaps of coal and as it absorbs the XP the pickaxe does the little bob and the XP bubbles disappear but Im also not gaining any levels when it absorbs. I hope the video helps as I had to cut it down a lot. Thank you!