Many reasons can be the cause of transmission errors while playing an online game. Especially in cities the 2.4 GHz specrum is heavily utilized. Malfunctioning bluetooth devices, handheld phones or even microwave ovens can cause interference with your WiFi signal. Also the WiFi Aaccess points of your neighbors might interfere with your own WiFi connection. In all these cases the signal strength indicator on your phone may show full reception, hence it is not considered a reliable sign for error free communication.

Also in times of the corona pandemic, many internet service providers (ISP's) are reaching it's capacity limits and can cause drops of data packets at times of heavy load. This is especially the case during early evening hours when streaming services such as Netflix are used by many people.