Hi and welcome to the forum
There are two main causes of this problem, and both can be the culprit at the same time :doh:
1) The LG drive needs a cleaning of optical pickup (with time, dust on it can cause difficulties to recognize media).
2) As for all low quality media, with time discs become more and more difficult to read because of a progressive degradation.
Different drives have different capability to read degraded media, and this explain why some drives can read more easily these discs compared to the LG.
My suggestion is to recover all data from these discs as soon as possible and burn again them on a quality disc like Verbatim before the disc become totaly unreadable.