Vacuum hose stuck in dipstick tube during oil change – what did it snag on?

I just did an oil change on my 2015 Fabia III 1.4 TDI and had a slightly alarming experience with my oil extractor pump.

I've used this before without issue. I inserted the hose through the dipstick tube as normal and didn't feel like I'd pushed it in especially far. I gave it a wiggle as I turned on the pump, but when I came to remove the hose, it was completely stuck. After a bit of careful pulling, the hose unfortunately snapped about halfway along the dipstick tube.

I then removed the dipstick guide tube from the engine (mercifully easy!) and, with some gentle but firm persuasion, managed to retrieve the remaining section of hose intact. Thankfully, nothing appears to have been left behind in the engine, and everything is back together and working normally.

What I'm struggling to understand is how it got stuck in the first place. My assumption was always that the extraction tube bottoms out in the sump. I certainly don't think I forced it in excessively, so I'm surprised it managed to snag on anything.

Interested to hear if anyone knows what it might have caught on.

Edited 1 hour ago1 hr by Jacque_Lucque