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I had a similar problem with a different part that I resolved by upping the PVA temp to 190 and using a PVA raft:
I find it odd that it only happened on one side. Dunno about that one, but here's the same part with new settings. The only thing I changed was temp and raft:
I think what was happening was the PVA layers were not adhering *to each other*. Bed adhesion was fine. A raft just upped the bed adhesion a bit and the slightly higher temp helped the layers to melt together better.
The problem with the squashed cylinder in my first part is the same. If you look at the first pic in this post you can see how the entire left side is raised. Well, this was acting as a spring because you can see it was curling up. Every time the nozzle went over that section it pushed the part down so the PLA layers were getting squashed. Once I finish the other parts I'll reprint the one in the OP, but I bet this will solve the problem.
I got the filament out by removing the printhead completely then disassembling it from the rails. What a freaking PITA, but it's out, and now I've learned how to remove the pint head, so that's a plus. Here's what the filament looked like: