A wave 3 almost always has "identifiable" 1-5 pattern but since we are masters (if I may say so myself ahem

A reality based on 10 years of charting .
A Wave 5 can have an ABC ending where C might have 1-5 or another ABC inside it. In other words it is not a 100% guarantee that wave 5 will always have 1-5 waves at least not on the same time frame. Wave 3 and 5 usually have different levels of momentum and volatility and for that reason you might not see the same wave "fall into place" on the same time frame.
THIS IS PROFOUND. if you don't get it its fine. Wait for it the penny will drop at a later stage. Suffice to know that it is for that reason TZ1 and TZ1(a) are highly useful and fully recommended.
Something very unique to AIMS Stress Free Trading ... Study this chart below. (carefully) Any questions just reply
Below you will see the right portion of the chart blown up. This chart shows 1-2-3 in wave 3 and 1-23 or abc in wave 5.
Finally a real answer to the question WHY?
This is because some 1-5 waves that we see using our Method/ The Setup are sometimes, abc of the higher time frames. And ABC's usually have abc zig zag sinde the waves.