When experience orbs are being spawned they often get stuck in non regular blocks that got "special" shapes (for example extended pistons, hoppers, stairs, anvils, cauldrons, fences and so on)

Lately there have been introduced more and more blocks with special shapes. These can have uses that are good for the gameplay, like for example if you want to store a small chicken in a cauldron, but they can also be a huge annoyance when XP orbs get stuck in them with no way of getting out to the player.

It is hard to make simple steps to replicate it just like that, since it seems to be a bit of a random factor in what XP gets stuck and what doesn't, but it happens so often that it is hard to deny it happening. An example of something that would produce this behavior very often is for example if you have something like a spider trap with staired walkways, pistons for crushers, gates to let spiders in, fences to stop spiders from getting out, hoppers under them to collect the loot and maybe some waterstreams (Don't know how the waterstreams affect this though).
You will get XP orbs stuck in the space where the extended pistons are, under behind the corners of fences (that they normally should be able to move around when tracking the player), under the edges of hoppers (or maybe in them, I don't know) and everywhere else that you can think of.

I don't know if this is a "bug" in the way a bug is considered, but it is at least not working as [I think] it is intended.

It can be a huge annoyance at least, and it produces a lot of entities locked in contraptions.

Possible ways to solve this and also help them not getting stuck in general could be:

• Better player tracking
• XP orbs being able to move through all non solid blocks (Like glass, stairs, slabs and so on)
• XP orbs having a smaller hitbox (Making it easier for them to get around corners and out in the open from wherever they are stuck)
• XP orbs having an increased random movement in all three dimensions so that they eventually find their way to the player.