Ignition 8.1.31. The tag paths are the same, and I really can't see what the problem is.
Your Tag History binding filters for the last 8 hours. Is it possible that the four rows your expression returns are from earlier than the last 8 hours?
No, the data has just been generated. And, the default params of queryTagHistory function is the last 8 hours.
It is possible, though hopefully not the case, that the tag history binding configuration is struggling with the characters in your tag path.
If you export the project (or view it on the gateway's filesystem), in the view.json file you should be able to find the tag history binding configuration, and see whether the non-ASCII characters are showing up correctly.