This is by design.
The Touch action is set up for the binding <Touchscreen>/touch* which will receive every kind of state change in that binding (e.g. for changes of position, phase, press, tap, tapCount, etc).
A better usage would be to set the input action with <Touchscreen>/touch*/position, <Touchscreen>/touch*/press, <Touchscreen>/touch*/phase, or something else that this action should track.
NOTE: Unfortunately, using the wildcard binding syntax needs to be done manually in the .inputaction asset file as the Asset Editor UI currently doesn't support wildcard binding syntax other than for <Touchscreen>/touch*/press.