Position problems on the Poles

Anonymous from SF forum:
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Hi, I have discovered an anomaly with the poles of earth. From the poles, at 90 degrees of latitude either north or south, there should be no difference in longitude, i.e. you are free to choose any longitude without messing up posistions of celestial bodies. However, if we travel there using Stellarium we see that lognitude indeed does make a difference. These two screen shots show the differences in the position of the moon from different longitudes at 90 S (South Pole telescope).

https://imgur.com/a/euz7i

This seems highly unlikely, as 89 S does not generate a large difference between longitudes (however, a small one, which is plausible).

The difference is just as large as if we stood at the equator!

This affects all bodies, not only earth.

I am using the latest dev beta (stellarium-0.90.0.9873-win64), if this is a new issue.
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Could still be a problem with earth figure corrections.