Cinderhulk + Deathcap + Crimson Pact (Vlad) = Infinite?

There may or may not be a bug here, but because I am not sure, I have put this thread in Misc.

So, if you follow ACTUAL math, the way Cinder+Cap+Vlad's Passive should work is displayed below, using 'EXAMPLE' numbers:

Vlad has 100 AP and 1000 Health. Deathcap -> now has 220 AP, plus 30% of 220, or a total of 286 AP Cinderhulk -> now has 1300 Health, plus 25% of 1300, or a total of 1675 Health

NOW we add vlad's Passive. 2.5% of 675 -> 16.875 AP 140% of 286 -> 400.4 Health

ok, so we are good....except, we need to add these new additions back into the % increases. Deathcap -> 30% of 16.875 = 5.0625 more ap. Cinderhulk -> 25% of 400.4 = 100.1 more health.

But now, we feed these number back into his passive, because they were generated by ITEMS not his passive. Which will then feed the additions from his passive back into the items.... Which will then go back into the passive..... ......

Lots of numbers later, these numbers "approach infinity" on how small they are, but increase for ever. I have tested, Vlad does not reach infinity when these items are bought....so, my question:

What happens instead of going on forever when you buy these items? When I tried it, the numbers for my buffs seemed rather small, and I am wondering if the interaction may be wrong.