I cannot replicate your performance with my Xperia 10 II (not III), unless the fix has been done in outdoor before. In such a case, it is going to lose the fix and then the accuracy, also.
Can you help me telling me what exactly do you remember you did?
I have reported my problem here below:
About this
I have installed UnifiedNLP support but not all the sanity checks cannot be fulfilled. However, GSM triangulation gaves me a position within a 9000m (9km) range.
Therefore, fixing satellites to improve it, would be wonderful.