Whoever is supposed to be involved in this has had 4 years to produce some evidence, but it hasn't happened. You'll  notice that the latest appearance is dated January last year. I fear that this will be one of those stories that, like the Mk Vs in Berlin,  keeps resurfacing whenever someone stumbles across it on the Internet.Â
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"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
That "Ukrainian" story is a separate thing and looks even more absurd than "Polish" story.
Coming back to Poland - completely no news, no info about any attempts to check what it really was (and whether anything was there!) or to take it out of water. Maybe they checked and found out that it was something not worth taking out. Maybe there was never any vehicle in water there - at least one of the guys who informed about it has bad reputation for making up "military"stories. The guys who informed about it are quiet, they made fools of themselves and that's all.
If I recall correctly, every single German-made tracked vehicle was strictly used on the Western Front. Unless any remained in Germany itself and was not found.
