Help with using Transmitter/Receiver with motors

I'm trying to build my own RC car, and to get up running, I bought the following items (Note I need this to move slowly, hence the 60 RPM motor) :

Flysky Fs-T6 2.4G 6 Channel Radio System : https://www.amazon.co.uk/Flysky-Model-Fs-T6-Channel-System/dp/B00F395NRI
3300mah 7.2v NiMH Battery : https://www.ebay.co.uk/itm/Overland...e=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649
12v 60 RPM Motor : **broken link removed**
Motor Speed Controller : https://www.amazon.co.uk/gp/product/B0722HM5NN

I've hooked everything up, but the problem I am having is that when I rapidly switch from forward to reverse using one of the thumb sticks on the transmitter, the motor stops and will not do anything until I return to the neutral thumb position and try again. Yet, if I go forwards, flick back to neutral, wait 1 second and then go backwards, it works?

Is this due to a problem with the configuration I have bought? ... possibly because the motor is 12v and the battery is only 7.2v? ... I thought this would work fine, just that it would be slower?

Reversing a motor rapidly is generally not a good idea because it causes a big current surge. It is possible that your controller copes with the surge by shutting down temporarily to protect itself.

ah right. I was planning on using 2 motors and two controllers and have it setup like a tank, where to steer you change the direction of the motors. So how would I do that so I can freely turn without delay/issues?