Yes, I noticed the problems mentioned by Malcom with my eyepieces (the same as yours), so I bought a premium 8mm eyepiece with a larger FOV last week because sometimes it was difficult to find an object again with the 10mm once it had drifted out of view, so I had to try and find it again with the 25mm one and then change the eyepiece again, which was a bit tiresome.
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