Try to change wifi channels from the carsifi app. Drop outs can be linked to heavy interference on a specific channel (frequency). So changing it could solve the problem.
But be aware if you have default values now - channel 36 and change to 149 for example … you are avoiding interference on channel 36, but get interference on channel 149. In practical terms, dropouts will occur in different areas for 149 than for 36. So in the end choose the channel with less dropouts.